@article{yao_cui_cui_zhu_2022, title={Soft electrothermal actuators using silver nanowire heaters (vol 9, pg 3797, 2017)}, volume={14}, ISSN={["2040-3372"]}, DOI={10.1039/d2nr90086f}, abstractNote={Correction for 'Soft electrothermal actuators using silver nanowire heaters' by Shanshan Yao et al., Nanoscale, 2017, 9, 3797-3805, https://doi.org/10.1039/C6NR09270E.}, number={17}, journal={NANOSCALE}, author={Yao, Shanshan and Cui, Jianxun and Cui, Zheng and Zhu, Yong}, year={2022}, month={May}, pages={6671–6671} } @article{cui_adams_zhu_2018, title={Controlled bending and folding of a bilayer structure consisting of a thin stiff film and a heat shrinkable polymer sheet}, volume={27}, ISSN={["1361-665X"]}, DOI={10.1088/1361-665x/aab9d9}, abstractNote={Bending pre-designed flat sheets into three-dimensional (3D) structures is attracting much interest, as it provides a simple approach to make 3D devices. Here we report controlled bending and folding of a bilayer structure consisting of a heat shrinkable polymer sheet and a thin stiff film (not thermally responsive). Upon heating, the prestrained polymer sheet shrinks, leading to bending or folding of the bilayer. We studied the effect of relative dimensions of the two layers on the bending behavior and demonstrated the transition from longitudinal bending to transverse bending of the bilayer strip. Transverse bending was utilized to fold origami structures, including several flat letters, a crane, and a corrugated metal sheet via Miura-ori folding. We developed a method to further control the bending orientation based on bio-inspired anisotropic bending stiffness. By bending the metal foil in different orientations, several structures were obtained, including cylindrical surfaces and left-handed/right-handed helical structures.}, number={5}, journal={SMART MATERIALS AND STRUCTURES}, author={Cui, Jianxun and Adams, John G. M. and Zhu, Yong}, year={2018}, month={May} } @article{cui_yao_huang_adams_zhu_2017, title={Controlling the self-folding of a polymer sheet using a local heater: the effect of the polymer-heater interface}, volume={13}, ISSN={["1744-6848"]}, DOI={10.1039/c7sm00568g}, abstractNote={Self-folding of a pre-strained shape memory polymer (SMP) sheet was demonstrated using local joule heating. Folding is caused by shrinkage variation across the thickness of the SMP sheet. The folding direction can be controlled by the interfacial interaction between the heater and the SMP sheet. When the heater is placed on the SMP sheet with no constraint (weak interface), the SMP sheet folds toward the heater. Temperature gradient across the SMP thickness gives rise to the shrinkage variation. By contrast, when the heater is fixed to the SMP sheet (strong interface), the SMP sheet can fold away from the heater. In this case shrinkage variation is dictated by the constraining effect of the heater. In either mode, 180 degrees folding can be achieved. The folding angle can be controlled by varying the heater width and folding time. This method is simple and can be used to fold structures with sharp angles in a sequential manner. A variety of structures were folded as demonstrations, including digital numbers 0-9, a cube, a boat, and a crane.}, number={21}, journal={SOFT MATTER}, author={Cui, Jianxun and Yao, Shanshan and Huang, Qijin and Adams, John G. M. and Zhu, Yong}, year={2017}, month={Jun}, pages={3863–3870} } @article{cui_adams_zhu_2017, title={Pop-up assembly of 3D structures actuated by heat shrinkable polymers}, volume={26}, ISSN={["1361-665X"]}, DOI={10.1088/1361-665x/aa9552}, abstractNote={Folding 2D sheets into desired 3D structures is a promising fabrication technique that can find a wide range of applications. Compressive buckling provides an attractive strategy to actuate the folding and can be applied to a broad range of materials. Here a new and simple method is reported to achieve controlled compressive buckling, which is actuated by a heat shrinkable polymer sheet. The buckling deformation is localized at the pre-defined creases in the 2D sheet, resulting in sharp folding. Two approaches are developed to actuate the transformation, which follow similar geometric rules. In the first approach, the 2D precursor is pushed from outside, which leads to a 3D structure surrounded by the shrunk polymer sheet. Assembled 3D structures include prisms/pyramids with different base shapes, house roof, partial soccer ball, Miura-ori structure and insect wing. In the second approach, the 2D precursor is pulled from inside, which leads to a 3D structure enclosing the shrunk polymer sheet. Prisms/pyramids with different base shapes are assembled. The assembled structures are further tessellated to fabricate cellular structures that can be used as thermal insulator and crash energy absorber. They are also stacked vertically to fabricate complex multilayer structures.}, number={12}, journal={SMART MATERIALS AND STRUCTURES}, author={Cui, Jianxun and Adams, J. G. M. and Zhu, Yong}, year={2017}, month={Dec} } @article{yao_cui_cui_zhu_2017, title={Soft electrothermal actuators using silver nanowire heaters}, volume={9}, ISSN={["2040-3372"]}, DOI={10.1039/c6nr09270e}, abstractNote={Low-voltage and extremely flexible electrothermal bimorph actuators were fabricated in a simple, efficient and scalable process. The bimorph actuators were made of flexible silver nanowire (AgNW) based heaters, which exhibited a fast heating rate of 18 °C s-1 and stable heating performance with large bending. The actuators offered the largest bending angle (720°) or curvature (2.6 cm-1) at a very low actuation voltage (0.2 V sq-1 or 4.5 V) among all types of bimorph actuators that have been reported to date. The actuators can be designed and fabricated in different configurations that can achieve complex patterns and shapes upon actuation. Two applications of this type of soft actuators were demonstrated towards biomimetic robotics - a crawling robot that can walk spontaneously on ratchet surfaces and a soft gripper that is capable of manipulating lightweight and delicate objects.}, number={11}, journal={NANOSCALE}, author={Yao, Shanshan and Cui, Jianxun and Cui, Zheng and Zhu, Yong}, year={2017}, month={Mar}, pages={3797–3805} } @article{barsh_bergman_brown_singh_copenhaver_2016, title={Bringing PLOS Genetics Editors to Preprint Servers}, volume={12}, ISSN={["1553-7404"]}, DOI={10.1371/journal.pgen.1006448}, abstractNote={1 HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, United States of America, 2 Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America, 3 Department of Genetics, University of Georgia, Athens, Georgia, United States of America, 4 Department of Genetics, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America, 5 Program in Genetics, Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, United States of America, 6 Department of Biology and the Integrative Program for Biological and Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, United States of America}, number={12}, journal={PLOS GENETICS}, author={Barsh, Gregory S. and Bergman, Casey M. and Brown, Christopher D. and Singh, Nadia D. and Copenhaver, Gregory P.}, year={2016}, month={Dec} }