@article{snyder_davis_berg_pearce_romanyuk_jiricek_paskova_ivanisevic_2019, title={Passivation of semipolar (10-1-1) GaN with different organic adsorbates}, volume={236}, ISSN={["1873-4979"]}, DOI={10.1016/j.matlet.2018.10.109}, abstractNote={Expanding the functionality of electronic materials is often reliant on the attachment of organic molecules to the surface. In this study, several methods for passivating the surface of semipolar (10-1-1) GaN with different chemistries were examined; this included simple physisorption, in-situ functionalization using phosphonic acids, and a two-step carboxylic acid attachment with a peroxide pretreatment. The binding of a variety of different organic adsorbates on semipolar substrates was quantified using X-ray photoelectron spectroscopy (XPS). Our results confirm binding at the organic-inorganic interface through the presence of amine/amide species on the surface. The wide variety of organic molecules, and their binding to inorganic electronic materials, can be exploited to impart specific functionalities in technologies spanning fields of energy, biomedical science, and chemical sensing.}, journal={MATERIALS LETTERS}, author={Snyder, Patrick J. and Davis, Hailey and Berg, Nora G. and Pearce, Brady and Romanyuk, Oleksandr and Jiricek, Petr and Paskova, Tania and Ivanisevic, Albena}, year={2019}, month={Feb}, pages={201–204} }
 @article{pearce_berg_jiang_ivanisevic_2016, title={Aqueous stability of nanostructured aluminum and gallium oxyhydroxide before and after functionalization with lysine}, volume={184}, ISSN={["1873-4979"]}, DOI={10.1016/j.matlet.2016.08.071}, abstractNote={Composites of nanostructured aluminum and gallium oxyhydroxide (AlOOH and GaOOH) and l-lysine were synthesized using an environmentally friendly approach. These composites were investigated to determine the effects of the functionalization on the aqueous stability and leaching of aluminum and gallium. The organic and inorganic components present in the samples were assessed with X-Ray photoelectron spectroscopy (XPS) and Fourier transformed-infrared spectroscopy (FT-IR). In the GaOOH-lysine composite, XPS provided evidence of both the presence of gallium and lysine. Crystallographic information was gathered using X-Ray diffraction (XRD). The FT-IR and XRD spectra of the composite materials were dominated by peaks related to lysine, due to the nature of these samples. Inductively coupled plasma-mass spectrometry (ICP-MS) data were collected of the functionalized and non-functionalized samples left in solution for periods of 1 days, 5 days and 7 days. This provided evidence of improved aqueous stability of the AlOOH-lysine composite with no effect seen in the GaOOH-lysine composite. The findings of this study will be used in determining the importance of lysine functionalization for future biomolecule-nanomaterial composites.}, journal={MATERIALS LETTERS}, author={Pearce, Brady L. and Berg, Nora G. and Jiang, Lin and Ivanisevic, Albena}, year={2016}, month={Dec}, pages={278–281} }
 @article{berg_pearce_rohrbaugh_jiang_nolan_ivanisevic_2017, title={Gallium containing composites as a tunable material to understand neuronal behavior under variable stiffness and radiation conditions}, volume={71}, ISSN={["1873-0191"]}, DOI={10.1016/j.msec.2016.10.022}, abstractNote={We report a composite biomaterial containing nanostructured GaOOH and Matrigel™ that can be modulated with respect to its stiffness and radiosensitization properties. A variety of concentrations of GaOOH were added to the composite to alter the mechanical properties of the material as well as to tune the radiosensitizing properties to the composite. PC-12 cells were used to study the combined effects of different stimuli on cell behavior. NGF was given to the cells to record their morphology as well as viability. An increase in the substrate stiffness caused an increase in neurite outgrowth but a decrease in cell viability. In addition, increasing the radiation dose decreased neurite outgrowth but increased cell viability when radiosensitizing particles were present. A subtractive effect between radiosensitizing and mechanical stimuli was observed when PC-12 cells were grown on the GaOOH containing composite.}, journal={MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS}, author={Berg, Nora G. and Pearce, Brady L. and Rohrbaugh, Nathaniel and Jiang, Lin and Nolan, Michael W. and Ivanisevic, Albena}, year={2017}, month={Feb}, pages={317–321} }
 @article{pearce_berg_rahn_ivanisevic_2016, title={In situ and ex situ functionalization of nanostructured gallium oxy-hydroxide with a porphyrin dye}, volume={38}, ISSN={["1932-8745"]}, DOI={10.1002/sca.21315}, abstractNote={SummaryThe surface attachment of a porphyrin dye to nanocrystalline GaOOH was performed using two routes of solution‐based functionalization. The first method of functionalization utilized an in situ incorporation of dissolved porphyrin salt in solution during the microwave synthesis step. Additionally, synthesized GaOOH nanorods were mixed in porphyrin solution after the microwave process to make an ex situ GaOOH/TTP‐PO­3. X‐ray photoelectron spectroscopy confirmed the presence of expected surface species and provided evidence of increased surface coverage of TTP‐PO3 on GaOOH in the ex situ­ GaOOH/TTP‐PO3 as compared to the in situ one. Size and morphology changes were investigated using SEM and, along with analysis of XRD, the in situ samples showed larger crystallite sizes. This was confirmed with PL due to the higher bandgap energy evident in the ex situ GaOOH/TTP‐PO3 compared to the in situ sample. A stability study was performed using fluorescence spectroscopy which indicated no leaching of porphyrin from the in situ GaOOH/TTP‐PO3. However, porphyrin leaching was evident from the ex situ GaOOH/TTP‐PO3 sample. The stability of the in situ GaOOH/TTP‐PO3 makes it attractive for a number of interfacial applications. SCANNING 38:671–683, 2016. © 2016 Wiley Periodicals, Inc.}, number={6}, journal={SCANNING}, author={Pearce, Brady L. and Berg, Nora G. and Rahn, Matthew S. and Ivanisevic, Albena}, year={2016}, month={Dec}, pages={671–683} }
 @article{berg_pearce_snyder_rohrbaugh_nolan_adhikari_khan_ivanisevic_2016, title={Interfaces with Tunable Mechanical and Radiosensitizing Properties}, volume={8}, ISSN={["1944-8252"]}, DOI={10.1021/acsami.5b11639}, abstractNote={We report the fabrication of a composite containing nanostructured GaOOH and Matrigel with tunable radiosensitizing and stiffness properties. Composite characterization was done with microscopy and rheology. The utility of the interface was tested in vitro using fibroblasts. Cell viability and reactive oxygen species assays quantified the effects of radiation dosages and GaOOH concentrations. Fibroblasts' viability decreased with increasing concentration of GaOOH and composite stiffness. During ionizing radiation experiments the presence of the scintillating GaOOH triggered a different cellular response. Reactive oxygen species data demonstrated that one can reduce the amount of radiation needed to modulate the behavior of cells on interfaces with different stiffness containing a radiosensitizing material.}, number={34}, journal={ACS APPLIED MATERIALS & INTERFACES}, author={Berg, Nora G. and Pearce, Brady L. and Snyder, Patrick J. and Rohrbaugh, Nathaniel and Nolan, Michael W. and Adhikari, Prajesh and Khan, Saad A. and Ivanisevic, Albena}, year={2016}, month={Aug}, pages={21956–21961} }
 @article{pearce_berg_ivanisevic_2017, title={Synthesis and optical characterization of mixed nanostructured aluminum-gallium oxy-hydroxide}, volume={5}, ISSN={["2166-3831"]}, DOI={10.1080/21663831.2016.1232317}, abstractNote={ABSTRACT Nanostructured oxy-hydroxide materials with varied compositions of aluminum and gallium were synthesized in an environmentally friendly way with water as the only solvent. The tunability of optical properties of these materials through concentration ranges is particularly of interest for organic/inorganic hybrid materials in optoelectronic devices. Size comparisons of the materials were performed using dynamic light scattering measurements. The measured size of the particles decreased with increasing Al. This supports the blue shift seen from the GaOOH emission wavelength to the Al0.5Ga0.5OOH emission wavelength in the photoluminescence spectra. The X-ray diffraction showed the formation of a possible amorphous layer in Al0.5Ga0.5OOH and Al0.2Ga0.8OOH. GRAPHICAL ABSTRACT IMPACT STATEMENT A water-based synthesis for mixed aluminum–gallium nanostructured oxides is presented with size comparisons and optical characteristics demonstrating emission wavelength tunability.}, number={2}, journal={MATERIALS RESEARCH LETTERS}, author={Pearce, Brady L. and Berg, Nora G. and Ivanisevic, Albena}, year={2017}, pages={124–127} }
 @misc{pearce_wilkins_paskova_ivanisevic_2015, title={A review of in situ surface functionalization of gallium nitride via beaker wet chemistry}, volume={30}, ISSN={["2044-5326"]}, DOI={10.1557/jmr.2015.132}, abstractNote={Abstract}, number={19}, journal={JOURNAL OF MATERIALS RESEARCH}, author={Pearce, Brady L. and Wilkins, Stewart J. and Paskova, Tania and Ivanisevic, Albena}, year={2015}, month={Oct}, pages={2859–2870} }
 @article{pearce_wilkins_rahn_ivanisevic_2015, title={In situ functionalization of gallium nitride powder with a porphyrin dye}, volume={30}, ISSN={["2044-5326"]}, DOI={10.1557/jmr.2015.152}, abstractNote={Abstract}, number={19}, journal={JOURNAL OF MATERIALS RESEARCH}, author={Pearce, Brady L. and Wilkins, Stewart J. and Rahn, Matthew S. and Ivanisevic, Albena}, year={2015}, month={Oct}, pages={2910–2918} }