Parallel Nanoimprint Forming of One-Dimensional Chiral Semiconductor for Strain-Engineered Optical Properties  

作　　者：Yixiu Wang Shengyu Jin Qingxiao Wang Min Wu Shukai Yao Peilin Liao Moon JKim Gary JCheng Wenzhuo Wu 

机构地区：[1]School of Industrial Engineering,Purdue University,West Lafayette,IN 47907,USA [2]Flex Laboratory,Purdue University,West Lafayette,IN 47907,USA [3]Department of Materials Science and Engineering,University of Texas at Dallas,Richardson,TX 75080,USA [4]School of Materials Engineering,Purdue University,West Lafayette,IN 47907,USA [5]Birck Nanotechnology Center,Purdue University,West Lafayette,IN 47907,USA [6]Regenstrief Center for Healthcare Engineering,Purdue University,West Lafayette,IN 47907,USA

出　　处：《Nano-Micro Letters》2020年第11期242-254,共13页纳微快报（英文版）

基　　金：the College of Engineering and School of Industrial Engineering at Purdue University for startup support;partially supported by the National Science Foundation under Grant CMMI-1762698;financial assistance from ONR NEPTUNE program National Science Foundation under Grant CMMI-1538360;supported by the Louis Beecherl, Jr. Endowment Funds;the College of Engineering and School of Materials Engineering at Purdue University for startup support;supported through computational resources provided by the Information Technology department at Purdue University。

摘　　要：The low-dimensional,highly anisotropic geometries,and superior mechanical properties of one-dimensional(1D) nanomaterials allow the exquisite strain engineering with a broad tunability inaccessible to bulk or thin-film materials.Such capability enables unprecedented possibilities for probing intriguing physics and materials science in the 1-D limit.Among the techniques for introducing controlled strains in 1D materials,nanoimprinting with embossed substrates attracts increased attention due to its capability to parallelly form nanomaterials into wrinkled structures with controlled periodicities,amplitudes,orientations at large scale with nanoscale resolutions.Here,we systematically investigated the strain-engineered anisotropic optical properties in Te nanowires through introducing a controlled strain field using a resist-free thermally assisted nanoimprinting process.The magnitude of induced strains can be tuned by adjusting the imprinting pressure,the nanowire diameter,and the patterns on the substrates.The observed Raman spectra from the chiral-chain lattice of 1D Te reveal the strong lattice vibration response under the strain.Our results suggest the potential of 1D Te as a promising candidate for flexible electronics,deformable optoelectronics,and wearable sensors.The experimental platform can also enable the exquisite mechanical control in other nanomaterials using substrate-induced,on-demand,and controlled strains.

关 键 词：Chiral semiconductor Nanowires NANOIMPRINTING Strain engineering Optical property 

分 类 号：TN30[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]