@article{cheng_backman_zhang_abuzaid_li_yu_cao_davydov_luisier_richter_et al._2023, title={Distinct Contact Scaling Effects in MoS2 Transistors Revealed with Asymmetrical Contact Measurements}, ISSN={["1521-4095"]}, DOI={10.1002/adma.202210916}, abstractNote={Abstract2D semiconducting materials have immense potential for future electronics due to their atomically thin nature, which enables better scalability. While the channel scalability of 2D materials has been extensively studied, the current understanding of contact scaling in 2D devices is inconsistent and oversimplified. Here physically scaled contacts and asymmetrical contact measurements (ACMs) are combined to investigate the contact scaling behavior in 2D field‐effect transistors. The ACMs directly compare electron injection at different contact lengths while using the exact same MoS2 channel, eliminating channel‐to‐channel variations. The results show that scaled source contacts can limit the drain current, whereas scaled drain contacts do not. Compared to devices with long contact lengths, devices with short contact lengths (scaled contacts) exhibit larger variations, 15% lower drain currents at high drain–source voltages, and a higher chance of early saturation and negative differential resistance. Quantum transport simulations reveal that the transfer length of Ni–MoS2 contacts can be as short as 5 nm. Furthermore, it is clearly identified that the actual transfer length depends on the quality of the metal‐2D interface. The ACMs demonstrated here will enable further understanding of contact scaling behavior at various interfaces.}, journal={ADVANCED MATERIALS}, author={Cheng, Zhihui and Backman, Jonathan and Zhang, Huairuo and Abuzaid, Hattan and Li, Guoqing and Yu, Yifei and Cao, Linyou and Davydov, Albert V. and Luisier, Mathieu and Richter, Curt A. and et al.}, year={2023}, month={Apr} } @article{yu_li_xu_hu_liu_cao_2023, title={Phase Diagram of High-Temperature Electron-Hole Quantum Droplet in Two-Dimensional Semiconductors}, ISSN={["1936-086X"]}, DOI={10.1021/acsnano.3c01365}, abstractNote={Quantum liquids, systems exhibiting effects of quantum mechanics and quantum statistics at macroscopic levels, represent one of the most exciting research frontiers of modern physical science and engineering. Notable examples include Bose-Einstein condensation (BEC), superconductivity, quantum entanglement, and a quantum liquid. However, quantum liquids are usually only stable at cryogenic temperatures, significantly limiting fundamental studies and device development. Here we demonstrate the formation of stable electron-hole liquid (EHL) with the quantum statistic nature at temperatures as high as 700 K in monolayer MoS2 and elucidate that the high-temperature EHL exists as droplets in sizes of around 100-160 nm. We also develop a thermodynamic model of high-temperature EHL and, based on the model, compile an exciton phase diagram, revealing that the ionized photocarrier drives the gas-liquid transition, which is subsequently validated with experimental results. The high-temperature EHL provides a model system to enable opportunities for studies in the pursuit of other high-temperature quantum liquids. The results can also allow for the development of quantum liquid devices with practical applications in quantum information processing, optoelectronics, and optical interconnections.}, journal={ACS NANO}, author={Yu, Yiling and Li, Guoqing and Xu, Yan and Hu, Chong and Liu, Xiaoze and Cao, Linyou}, year={2023}, month={Aug} } @article{zhu_yan_li_cheng_li_liu_mao_cho_gao_gao_et al._2024, title={Recent developments of electrospun nanofibers for electrochemical energy storage and conversion}, volume={65}, ISSN={["2405-8289"]}, DOI={10.1016/j.ensm.2023.103111}, abstractNote={Electrochemical energy storage and conversion systems have received remarkable attention during the past decades because of the high demand of the world energy consumption. Various materials along with the structure designs have been utilized to enhance the overall performance. Among them, nanofibers have been widely explored due to their unique properties (i.e., high surface area, multi-functionality, high porosity, outstanding flexibility, etc.) during the past few decades. Meanwhile, electrospinning, considered a simple and low-cost approach, has attracted tremendous attention because those nanofibrous materials with functional properties prepared by this unique technique can address numerous issues, especially in energy fields. This paper aims to comprehensively review the latest advances in developing advanced electrospun nanofibers for electrochemical devices. It starts with a brief introduction to the advantages of the electrospinning technique. It highlights ongoing research activities, followed by the history of electrospinning, the principle of electrospinning, and the uniqueness of electrospun nanofibers. Afterward, state-of-the-art developments for their applications in electrochemical devices, including but not limited to rechargeable batteries, supercapacitors, fuel cells, solar cells, hydrogen storage, etc., are discussed in detail. A future vision regarding challenges and solutions is proposed at the end. This review aims to provide an extensive and comprehensive reference to apply functional electrospun nanofibers in energy areas.}, journal={ENERGY STORAGE MATERIALS}, author={Zhu, Jiadeng and Yan, Chaoyi and Li, Guoqing and Cheng, Hui and Li, Ya and Liu, Tianyi and Mao, Qian and Cho, Hyunjin and Gao, Qiang and Gao, Chunxia and et al.}, year={2024}, month={Feb} } @article{cao_wu_li_chen_chen_duan_chen_meng_li_2022, title={Ni3Fe nanoparticles encapsulated by N-doped carbon derived from MOFs for oxygen evolution reaction}, volume={919}, ISSN={["1873-4669"]}, DOI={10.1016/j.jallcom.2021.165799}, journal={JOURNAL OF ALLOYS AND COMPOUNDS}, author={Cao, Feng and Wu, Xinge and Li, Mengyang and Chen, Susu and Chen, Biao and Duan, Guosheng and Chen, Yan and Meng, Xiangying and Li, Guoqing}, year={2022}, month={Oct} } @article{wang_zhao_shen_liu_pang_gao_mu_cao_li_2021, title={Ni/NiO heterostructures encapsulated in oxygen-doped graphene as multifunctional electrocatalysts for the HER, UOR and HMF oxidation reaction}, volume={11}, ISSN={["2044-4761"]}, DOI={10.1039/d0cy02333g}, abstractNote={A controlled scalable arc-discharge method was developed to produce metal/metal oxide nanoparticles encapsulated in graphene as excellent catalysts for multiple reactions, including HER, UOR, and the HMF oxidation reaction.}, number={7}, journal={CATALYSIS SCIENCE & TECHNOLOGY}, author={Wang, Jianmin and Zhao, Zhen and Shen, Chen and Liu, Haopeng and Pang, Xueyong and Gao, Meiqi and Mu, Juan and Cao, Feng and Li, Guoqing}, year={2021}, month={Apr}, pages={2480–2490} } @article{abuzaid_cheng_li_cao_franklin_2021, title={Unanticipated Polarity Shift in Edge-Contacted Tungsten-Based 2D Transition Metal Dichalcogenide Transistors}, volume={42}, ISSN={["1558-0563"]}, DOI={10.1109/LED.2021.3106286}, abstractNote={Creating metal edge contacts in transition metal dichalcogenide (TMD) transistors is a promising path to advance transistor miniaturization for future technology nodes. Current experimental demonstrations nearly exclusively focus on MoS2 as the channel material. Here, we create edge-contacted WSe2 and WS2 transistors using a convergent Ar+ ion beam source integrated within an e-beam evaporator chamber for in-situ processing. An unanticipated polarity shift was observed compared to top-contact behavior for Ti-WS2 devices, which displayed p-type conduction. Meanwhile, three distinct metal contact materials yielded comparable p-branch-dominant performance on WSe2. Transmission electron microscope (TEM) imaging with energy dispersive spectroscopy (EDS) analysis indicated the existence of a residual layer of W (and chalcogen atoms to a lesser extent) beneath the metal contacts, even though the substrate was over-etched. The images presented a physically pure edge interface. This intriguing etching effect could carry significant implications for the design of tungsten-based, edge-contacted TMD transistors.}, number={10}, journal={IEEE ELECTRON DEVICE LETTERS}, author={Abuzaid, Hattan and Cheng, Zhihui and Li, Guoqing and Cao, Linyou and Franklin, Aaron D.}, year={2021}, month={Oct}, pages={1563–1566} } @article{cao_yang_shen_li_wang_qin_li_pang_li_2020, title={Electrospinning synthesis of transition metal alloy nanoparticles encapsulated in nitrogen-doped carbon layers as an advanced bifunctional oxygen electrode}, volume={8}, ISSN={["2050-7496"]}, DOI={10.1039/d0ta00826e}, abstractNote={A universal and scalable electrospinning method was developed to produce uniform multicomponent alloy nanoparticles encapsulated in N doped thin carbon layers as bifunctional catalysts for OER and ORR.}, number={15}, journal={JOURNAL OF MATERIALS CHEMISTRY A}, author={Cao, Feng and Yang, Xi and Shen, Chen and Li, Xin and Wang, Jianmin and Qin, Gaowu and Li, Song and Pang, Xueyong and Li, Guoqing}, year={2020}, month={Apr}, pages={7245–7252} } @article{li_chen_li_zhang_yang_liu_cao_2020, title={Engineering Substrate Interaction To Improve Hydrogen Evolution Catalysis of Monolayer MoS2 Films beyond Pt}, volume={14}, ISSN={["1936-086X"]}, DOI={10.1021/acsnano.9b07324}, abstractNote={MoS2 holds great promise as a cost-effective alternative to Pt for catalyzing the hydrogen evolution reaction (HER) of water, but its catalytic efficiency reported is still worse than Pt , the best HER catalyst but too rare and expensive for mass production of hydrogen. We report a strategy to enable the catalytic activity of monolayer MoS2 films even better than that of Pt via engineering the interaction of the monolayer with supporting substrates. The monolayer films were grown with CVD processes and controlled to have optimal density (7-10%) of sulfur vacancies. We find out that the catalytic activity of MoS2 can be affected by substrates in two ways: forming an interfacial tunneling barrier with MoS2 and modifying the chemical nature of MoS2 via charge transfer (proximity doping). Following this understanding, we enable excellent catalytic activities at the monolayer MoS2 films by using substrates that can provide n-doping to MoS2 and forms low interfacial tunneling barriers with MoS2, such as Ti. The catalytic performance may be further boosted to be even better than Pt by crumpling the films on flexible substrates, as the Tafel slope of the film is substantially lowered with the presence of crumpling-induced compressive strain. The monolayer MoS2 films show remarkable stability without any degradation in catalytic performance after being continuously tested for over two months.}, number={2}, journal={ACS NANO}, author={Li, Guoqing and Chen, Zehua and Li, Yifan and Zhang, Du and Yang, Weitao and Liu, Yuanyue and Cao, Linyou}, year={2020}, month={Feb}, pages={1707–1714} } @article{yu_yu_li_puretzky_geohegan_cao_2020, title={Giant enhancement of exciton diffusivity in two-dimensional semiconductors}, volume={6}, ISSN={["2375-2548"]}, DOI={10.1126/sciadv.abb4823}, abstractNote={The exciton diffusivity of 2D semiconductors can be improved by 15-fold with trapped charges that can screen exciton scattering.}, number={51}, journal={SCIENCE ADVANCES}, author={Yu, Yiling and Yu, Yifei and Li, Guoqing and Puretzky, Alexander A. and Geohegan, David B. and Cao, Linyou}, year={2020}, month={Dec} } @article{wang_cao_shen_li_li_yang_li_qin_2020, title={Nanoscale nickel-iron nitride-derived efficient electrochemical oxygen evolution catalysts}, volume={10}, ISSN={["2044-4761"]}, DOI={10.1039/d0cy00689k}, abstractNote={Ni3FeN/Ni heterostructures are preparedviachemical etching followed by a nitridation process, and thein situgenerated NiFeOOH/Ni3FeN/Ni exhibits outstanding OER activity.}, number={13}, journal={CATALYSIS SCIENCE & TECHNOLOGY}, author={Wang, Jianmin and Cao, Feng and Shen, Chen and Li, Guoqing and Li, Xin and Yang, Xi and Li, Song and Qin, Gaowu}, year={2020}, month={Jul}, pages={4458–4466} } @article{ma_guzelturk_li_cao_shen_lindenberg_heinz_2019, title={Recording interfacial currents on the subnanometer length and femtosecond time scale by terahertz emission}, volume={5}, ISSN={["2375-2548"]}, DOI={10.1126/sciadv.aau0073}, abstractNote={Electromagnetic radiation emitted by electrons allows their ultrafast motion to be probed on the atomic length scale.}, number={2}, journal={SCIENCE ADVANCES}, author={Ma, Eric Yue and Guzelturk, Burak and Li, Guoqing and Cao, Linyou and Shen, Zhi-Xun and Lindenberg, Aaron M. and Heinz, Tony F.}, year={2019}, month={Feb} } @article{shi_li_wang_2019, title={Triggering Catalytic Active Sites for Hydrogen Evolution Reaction by Intrinsic Defects in Janus Monolayer MoSSe}, volume={123}, ISSN={["1932-7447"]}, DOI={10.1021/acs.jpcc.9b01485}, abstractNote={Janus transition-metal dichalcogenides have been predicted to be promising candidates for hydrogen evolution reaction (HER) due to their inherent structural asymmetry. However, the effect of intrinsic defects, including vacancies, antisites, and grain boundaries, on their catalytic activity is still unknown. MoSSe provides an ideal platform for studying such defects, since theoretical calculation has indicated that the formation energies of point defects and grain boundaries on MoSSe were lower than that of pristine MoS2 monolayer. In this work, density functional theory is utilized to study all of the possible intrinsic defects on the MoSSe monolayer for HER. The MoSSe monolayer with 4|4, 4|8a, 5|7b, 8|10a GBs, vacancies (VS, VSe, VSSe, VMo, VMoS3), and antisite defects (MoSSe, SeMo, SMo) shows enhanced HER performance. The adsorption behavior of hydrogen on defects were explained by using a “states-filling” model. The adsorption energy of hydrogen during catalysis changes linearly with the work required...}, number={19}, journal={JOURNAL OF PHYSICAL CHEMISTRY C}, author={Shi, Wenwu and Li, Guoqing and Wang, Zhiguo}, year={2019}, month={May}, pages={12261–12267} } @article{jia_chen_oladele_tang_li_zhang_yan_2018, title={Cobalt doping of tin disulfide/reduced graphene oxide nanocomposites for enhanced pseudocapacitive sodium-ion storage}, volume={1}, ISSN={["2399-3669"]}, url={https://publons.com/publon/26924643/}, DOI={10.1038/s42004-018-0086-z}, abstractNote={AbstractRechargeable sodium-ion batteries are receiving intense interest as a promising alternative to lithium-ion batteries, however, the absence of high-performance anode materials limits their further commercialization. Here we prepare cobalt-doped tin disulfide/reduced graphene oxide nanocomposites via a microwave-assisted hydrothermal approach. These nanocomposites maintain a capacity of 636.2 mAh g−1 after 120 cycles under a current density of 50 mA g−1, and display a capacity of 328.3 mA h g−1 after 1500 cycles under a current density of 2 A g−1. The quantitative capacitive analysis demonstrates that the electrochemical performance of the nanocomposite originates from the combined effects of cobalt and sulfur doping, resulting in the enhanced pseudocapacitive contribution (52.8 to 89.8% at 1 mV s−1) of tin disulfide. This work provides insight into tuning the structure of layered transition metal dichalcogenides via heteroatom doping to develop high-performance anode materials for sodium-ion batteries.}, journal={COMMUNICATIONS CHEMISTRY}, author={Jia, Hao and Chen, Chen and Oladele, Olabode and Tang, Yongan and Li, Guoqing and Zhang, Xiangwu and Yan, Fei}, year={2018}, month={Nov} } @article{lavini_calo_gao_albisetti_li_cao_li_cao_aruta_riedo_2018, title={Friction and work function oscillatory behavior for an even and odd number of layers in polycrystalline MoS2}, volume={10}, ISSN={["2040-3372"]}, DOI={10.1039/c8nr00238j}, abstractNote={We report on a new oscillatory behavior of nanoscopic friction in continuous polycrystalline MoS2films for an odd and even number of atomic layers, related to the different in-plane polarization of crystalline grains and different capability of absorbing charged molecules.}, number={17}, journal={NANOSCALE}, author={Lavini, Francesco and Calo, Annalisa and Gao, Yang and Albisetti, Edoardo and Li, Tai-De and Cao, Tengfei and Li, Guoqing and Cao, Linyou and Aruta, Carmela and Riedo, Elisa}, year={2018}, month={May}, pages={8304–8312} } @article{li_zhang_yu_huang_yang_cao_2017, title={Activating MoS2 for pH-Universal Hydrogen Evolution Catalysis}, volume={139}, ISSN={["1520-5126"]}, DOI={10.1021/jacs.7b07450}, abstractNote={MoS2 presents a promising catalyst for the hydrogen evolution reaction (HER) in water splitting, but its worse catalytic performance in neutral and alkaline media than in acidic environment may be problematic for practical application. This is because the other half reaction of water splitting, i.e., oxygen evolution reaction, often needs to be implemented in alkaline environment. Here we demonstrate a universal strategy that may be used to significantly improve the HER catalysis of MoS2 in all kinds of environments from acidic to alkaline, proton intercalation. Protons may be enabled to intercalate between monolayer MoS2 and underlying substrates or in the interlayer space of thicker MoS2 by two processes: electrochemically polarizing MoS2 at negative potentials (vs RHE) in acidic media or immersing MoS2 into certain acid solutions like TFSI. The improvement in catalytic performance is due to the activity enhancement of the active sites in MoS2 by the intercalated protons, which might be related with the effect of the intercalated protons on electrical conductance and the adsorption energy of hydrogen atoms. The enhancement in catalytic activity by the intercalated proton is very stable even in neutral and alkaline electrolytes.}, number={45}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Li, Guoqing and Zhang, Du and Yu, Yifei and Huang, Shengyang and Yang, Weitao and Cao, Linyou}, year={2017}, month={Nov}, pages={16194–16200} } @article{li_lee_michielsen_2017, title={Design of abrasion resistant super-antiwetting nylon surfaces}, volume={41}, ISSN={["1369-9261"]}, DOI={10.1039/c7nj02807e}, abstractNote={Abrasion resistant super-antiwetting nylon surface designed through a three-step wet chemistry steps}, number={22}, journal={NEW JOURNAL OF CHEMISTRY}, author={Li, Guoqing and Lee, Hoon Joo and Michielsen, Stephen}, year={2017}, month={Nov}, pages={13593–13599} } @article{yu_li_huang_barrette_cai_yu_gundogdu_zhang_cao_2017, title={Enhancing Multifunctionalities of Transition-Metal Dichalcogenide Monolayers via Cation Intercalation}, volume={11}, ISSN={1936-0851 1936-086X}, url={http://dx.doi.org/10.1021/ACSNANO.7B04880}, DOI={10.1021/acsnano.7b04880}, abstractNote={We have demonstrated that multiple functionalities of transition-metal dichalcogenide (TMDC) monolayers may be substantially improved by the intercalation of small cations (H+ or Li+) between the monolayers and underlying substrates. The functionalities include photoluminescence (PL) efficiency and catalytic activity. The improvement in PL efficiency may be up to orders of magnitude and can be mainly ascribed to two effects of the intercalated cations: p-doping to the monolayers and reducing the influence of substrates, but more studies are necessary to better understand the mechanism for the improvement in the catalytic functionality. The cation intercalation may be achieved by simply immersing substrate-supported monolayers into the solution of certain acids or salts. It is more difficult to intercalate under the monolayers interacting with substrates stronger, such as as-grown monolayers or the monolayers on 2D material substrates. This result presents a versatile strategy to simultaneously optimize multiple functionalities of TMDC monolayers.}, number={9}, journal={ACS Nano}, publisher={American Chemical Society (ACS)}, author={Yu, Yifei and Li, Guoqing and Huang, Lujun and Barrette, Andrew and Cai, Yong-Qing and Yu, Yiling and Gundogdu, Kenan and Zhang, Yong-Wei and Cao, Linyou}, year={2017}, month={Sep}, pages={9390–9396} } @article{chen_li_zhu_lu_jiang_hu_shen_zhang_2017, title={In-situ formation of tin-antimony sulfide in nitrogen-sulfur Co-doped carbon nanofibers as high performance anode materials for sodium-ion batteries}, volume={120}, ISSN={["1873-3891"]}, url={https://doi.org/10.1016/j.carbon.2017.05.072}, DOI={10.1016/j.carbon.2017.05.072}, abstractNote={As potential alternatives to lithium-ion batteries in grid energy storage application, sodium-ion batteries (SIBs) have attracted tremendous attention. Absence of high-performance anode material remains a challenge to commercialize SIBs. Herein, a SnSbSx/porous carbon nanofiber (SnSbSx/PCNF) composite with superior performance is successfully prepared via electrospinning, followed by a sulfuration treatment. The as-prepared SnSbSx/PCNF composite exhibits a unique two-dimensional nano-sheet morphology. As a result, the SnSbSx/PCNFs can deliver a high reversible capacity of 566.7 mAh g−1 after 80 cycles and achieve good cycling stability and rate capability when used as anode materials for SIBs. The improved electrochemical performance of SnSbSx/PCNFs can be ascribed to the synergistic effects of SnSbSx nano-sheets and enhanced diffusion coefficient of Na+ in sulfurated PCNFs (SPCNFs), which can not only provide good electronic conductivity but also buffer the volume change of the SnSbSx nano-sheets during sodiation/desodiation process. Additionally, the sulfuration process generates a sulfur doping effect on the PCNFs, further enhancing their sodium storage ability. Therefore, the excellent Na-storage ability demonstrates SnSbSx/PCNFs a great potential as anode material for high-performance SIBs.}, journal={CARBON}, publisher={Elsevier BV}, author={Chen, Chen and Li, Guoqing and Zhu, Jiadeng and Lu, Yao and Jiang, Mengjin and Hu, Yi and Shen, Zhen and Zhang, Xiangwu}, year={2017}, month={Aug}, pages={380–391} } @article{li_zhang_qiao_yu_peterson_zafar_kumar_curtarolo_hunte_shannon_et al._2016, title={All The Catalytic Active Sites of MoS2 for Hydrogen Evolution}, volume={138}, ISSN={0002-7863 1520-5126}, url={http://dx.doi.org/10.1021/jacs.6b05940}, DOI={10.1021/jacs.6b05940}, abstractNote={MoS2 presents a promising low-cost catalyst for the hydrogen evolution reaction (HER), but the understanding about its active sites has remained limited. Here we present an unambiguous study of the catalytic activities of all possible reaction sites of MoS2, including edge sites, sulfur vacancies, and grain boundaries. We demonstrate that, in addition to the well-known catalytically active edge sites, sulfur vacancies provide another major active site for the HER, while the catalytic activity of grain boundaries is much weaker. The intrinsic turnover frequencies (Tafel slopes) of the edge sites, sulfur vacancies, and grain boundaries are estimated to be 7.5 s-1 (65-75 mV/dec), 3.2 s-1 (65-85 mV/dec), and 0.1 s-1 (120-160 mV/dec), respectively. We also demonstrate that the catalytic activity of sulfur vacancies strongly depends on the density of the vacancies and the local crystalline structure in proximity to the vacancies. Unlike edge sites, whose catalytic activity linearly depends on the length, sulfur vacancies show optimal catalytic activities when the vacancy density is in the range of 7-10%, and the number of sulfur vacancies in high crystalline quality MoS2 is higher than that in low crystalline quality MoS2, which may be related with the proximity of different local crystalline structures to the vacancies.}, number={51}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Li, Guoqing and Zhang, Du and Qiao, Qiao and Yu, Yifei and Peterson, David and Zafar, Abdullah and Kumar, Raj and Curtarolo, Stefano and Hunte, Frank and Shannon, Steve and et al.}, year={2016}, month={Dec}, pages={16632–16638} } @article{huang_li_gurarslan_yu_kirste_guo_zhao_collazo_sitar_parsons_et al._2016, title={Atomically Thin MoS2 Narrowband and Broadband Light Superabsorbers}, volume={10}, ISSN={["1936-086X"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000381959100030&KeyUID=WOS:000381959100030}, DOI={10.1021/acsnano.6b02195}, abstractNote={We present a combined theoretical and experimental effort to enable strong light absorption (>70%) in atomically thin MoS2 films (≤4 layers) for either narrowband incidence with arbitrarily prespecified wavelengths or broadband incidence like solar radiation. This is achieved by integrating the films with resonant photonic structures that are deterministically designed using a unique reverse design approach based on leaky mode coupling. The design starts with identifying the properties of leaky modes necessary for the targeted strong absorption, followed by searching for the geometrical features of nanostructures to support the desired modes. This process is very intuitive and only involves a minimal amount of computation, thanks to the straightforward correlations between optical functionality and leaky modes as well as between leaky modes and the geometrical feature of nanostructures. The result may provide useful guidance for the development of high-performance atomic-scale photonic devices, such as solar cells, modulators, photodetectors, and photocatalysts.}, number={8}, journal={ACS NANO}, author={Huang, Lujun and Li, Guoqing and Gurarslan, Alper and Yu, Yiling and Kirste, Ronny and Guo, Wei and Zhao, Junjie and Collazo, Ramon and Sitar, Zlatko and Parsons, Gregory N. and et al.}, year={2016}, month={Aug}, pages={7493–7499} } @article{chen_li_lu_zhu_jiang_hu_cao_zhang_2016, title={Chemical vapor deposited MoS2/electrospun carbon nanofiber composite as anode material for high-performance sodium-ion batteries}, volume={222}, ISSN={["1873-3859"]}, url={https://publons.com/publon/26924666/}, DOI={10.1016/j.electacta.2016.11.170}, abstractNote={Due to its high theoretical capacity and unique layered structure, MoS2 has attracted attention as a sodium-ion battery anode material. However, the electrochemical performance of MoS2 based anodes is hindered by their low intrinsic conductivity and large volume change during cycling. In this report, nano-sized MoS2 sheets are synthesized using a scalable chemical vapor deposition method on the surface of electrospun carbon nanofibers (CNFs). The morphology of the resultant MoS2@CNFs is investigated by scanning electron microscopy, transmission electron microscopy and X-ray diffraction, while their electrochemical performance is studied using cyclic voltammetry and galvanostatic charge-discharge. The results demonstrate that a strong interconnection between MoS2 nanosheets and CNFs is formed and the conductive network of CNFs is beneficial for the sodium ion kinetics. When investigated as an anode for sodium-ion batteries, a high reversible capacity of 380 mA h g−1 is obtained after 50 cycles with good cycling stability. In particular, MoS2@CNFs can deliver a capacity of 198 mA h g−1 under a high current density of 1 A g−1 after 500 cycles, indicating their great potential as anode material for long-life sodium-ion batteries.}, journal={ELECTROCHIMICA ACTA}, publisher={Elsevier BV}, author={Chen, Chen and Li, Guoqing and Lu, Yao and Zhu, Jiadeng and Jiang, Mengjin and Hu, Yi and Cao, Linyou and Zhang, Xiangwu}, year={2016}, month={Dec}, pages={1751–1760} } @article{gurarslan_jiao_li_li_yu_gao_riedo_xu_cao_2016, title={Van der Waals Force Isolation of Monolayer MoS2}, volume={28}, ISSN={["1521-4095"]}, DOI={10.1002/adma.201601581}, abstractNote={Monolayer MoS2 can effectively screen the vdW interaction of underlying substrates with external systems by >90% because of the substantial increase in the separation between the substrate and external systems due to the presence of the monolayer. This substantial screening of vdW interactions by MoS2 monolayer is different from what reported at graphene.}, number={45}, journal={ADVANCED MATERIALS}, author={Gurarslan, Alper and Jiao, Shuping and Li, Tai-De and Li, Guoqing and Yu, Yiling and Gao, Yang and Riedo, Elisa and Xu, Zhiping and Cao, Linyou}, year={2016}, month={Dec}, pages={10055–10060} } @article{achinivu_howard_li_gracz_henderson_2014, title={Lignin extraction from biomass with protic ionic liquids}, volume={16}, ISSN={["1463-9270"]}, DOI={10.1039/c3gc42306a}, abstractNote={A simple, highly effective method for lignin extraction from biomass is reported using PILs which can easily be distilled/recovered.}, number={3}, journal={GREEN CHEMISTRY}, author={Achinivu, Ezinne C. and Howard, Reagan M. and Li, Guoqing and Gracz, Hanna and Henderson, Wesley A.}, year={2014}, pages={1114–1119} }