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Fabrication of plasmonic nanopyramidal array as flexible SERS substrate for biosensing application

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Nano Research 2023年第1期16卷 1132-1140页

作者： Anindita Das Udit Pant Cuong Cao Rakesh SMoirangthem Hitesh Bhanudas Kamble Nanophotonics Lab Department of PhysicsIndian Institute of Technology(Indian School of Mines)Dhanbad-826004India Institute for Global Food Security School of Biological SciencesQueen’s University of Belfast19 Chlorine GardensBelfastBT95DLUK Material and Advanced Technologies for Healthcare Queen’s University of Belfast18-30 Malone RoadBelfastBT95BNUK IITB Nanofabrication Facility Department of Electrical EngineeringIndian Institute of TechnologyBombay-400076India

The proposed work aims to develop a sensitive surface-enhanced Raman spectroscopy(SERS)*** inverted nano pyramid array on silicon substrate fabricated using electron beam lithography(EBL)was utilised as a master template and the mold was later replicated via nanoimprinting process to prepare gold-coated polymer nanopyramid three-dimensional(3D)SERS *** fast and versatile replication process using nanoimprinting lithography(NIL)can produce polymer nanopyramids in a low-cost and reproducible ***,the proposed fabrication protocol can be easily upscale for large scale *** intense electric field confinement at nanotips and four edges of gold-coated polymer nanopyramid enhanced the Raman signal of probe molecules,i.e.,Rhodamine 6G with a limit of detection down to 3.277×10−9 M was *** work also underlines the efficiency of gold-coated polymer nanopyramid arrays in the spectral detection of hemoglobin proteins at low *** Raman signal enhancement mechanism was further studied through the electromagnetic simulation using COMSOL *** addition,bending test experiments were performed to understand the effect of flexibility on SERS signal *** fabricated gold-coated polymer nanopyramids arrays could pave the way for the development of low-cost SERS platforms for the detection of hazardous biological and chemical compounds at ultra-low concentrations in practical applications.

关键词： nanopyramids surface-enhanced Raman spectroscopy(SERS) flexible hemoglobin protein nanoimprinting replica molding

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

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Nano-Micro Letters 2020年第11期12卷 242-254页

作者： Yixiu Wang Shengyu Jin Qingxiao Wang Min Wu Shukai Yao Peilin Liao Moon JKim Gary JCheng Wenzhuo Wu School of Industrial Engineering Purdue UniversityWest LafayetteIN 47907USA Flex Laboratory Purdue UniversityWest LafayetteIN 47907USA Department of Materials Science and Engineering University of Texas at DallasRichardsonTX 75080USA School of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA Regenstrief Center for Healthcare Engineering Purdue UniversityWest LafayetteIN 47907USA

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 *** capability enables unprecedented possibilities for probing intriguing physics and materials science in the 1-D *** 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 ***,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 *** magnitude of induced strains can be tuned by adjusting the imprinting pressure,the nanowire diameter,and the patterns on the *** observed Raman spectra from the chiral-chain lattice of 1D Te reveal the strong lattice vibration response under the *** results suggest the potential of 1D Te as a promising candidate for flexible electronics,deformable optoelectronics,and wearable *** 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

Biomimetic Moth-eye Anti-reflective Poly-(methyl methacrylate)Nanostructural Coating

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Journal of Bionic Engineering 2019年第6期16卷 1030-1038页

作者： Hongbo Xu Liuting Gong Shoucai Zhang Renping Ma Lei Pan Jiupeng Zhao Yao Li MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Beijing Institute of Space Mechanics and Electricity Beijing 100094China Beijing Vocational College of Labour and Social Security Beijing 102200China Center for Composite Material Harbin Institute of TechnologyHarbin 150001China

This study reports a simple imprinting method for the fabrication of biomimetic moth-eye antireflective polymethyl methacrylate(PMMA)nanostructures on the surface of the *** antireflection structured silicon was obtained by Reactive Ion Etching(RIE)*** using the antireflection structured silicon substrate as the imprinting stamp,the biomimetic moth-eye polymer structures showed tapered holes,whose depth and periodicity were around 780 nm and 580 nm,*** reflectance of the resulting PMMA structures was reduced from 10% to less than 1% in the wavelength range from 300 nm to 1600 *** simple methodology can be scaled up via self-loading and nanoimprinting,which may have a promising application in optoelectronic devices and solar cells.

关键词： nanoimprinting sub-wavelength structure antireflective biomimetic moth-eye

Electric-driven flexible-roller nanoimprint lithography on the stress-sensitive warped wafer

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International Journal of Extreme Manufacturing 2023年第3期5卷 608-618页

作者： Yu Fan Chunhui Wang Jiaxing Sun Xiaogang Peng Hongmiao Tian Xiangming Li Xiaoliang Chen Xiaoming Chen Jinyou Shao Micro-and Nano-technology Research Center State Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi’an 710049People’s Republic of China Frontier Institute of Science and Technology(FIST) Xi'an Jiaotong UniversityXi’an710049People’s Republic of China

Surface nanopatterning of semiconductor optoelectronic devices is a powerful way to improve their quality and ***,photoelectric devices’inherent stress sensitivity and inevitable warpage pose a huge challenge on fabricating nanostructures ***-driven flexible-roller nanoimprint lithography for nanopatterning the optoelectronic wafer is proposed in this *** flexible nanoimprint template twining around a roller is continuously released and recovered,controlled by the roller’s simple *** electric field applied to the template and substrate provides the driving *** contact line of the template and the substrate gradually moves with the roller to enable scanning and adapting to the entire warped substrate,under the electric *** addition,the driving force generated from electric field is applied to the surface of substrate,so that the substrate is free from external ***,liquid resist completely fills in microcavities on the template by powerful electric field force,to ensure the fidelity of the *** proposed nanoimprint technology is validated on the ***,nano-grating structures are fabricated on a gallium nitride light-emitting diode chip adopting the solution,achieving polarization of the light source.

关键词： nanoimprinting electric-driven flexible-roller warped stress-sensitive

Large-area gold nanohole arrays fabricated by one-step method for surface plasmon resonance biochemical sensing

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Science China(Life Sciences) 2018年第4期61卷 476-482页

作者： Huijie Qi Lihong Niu Jie Zhang Jian Chen Shujie Wang Jingjing Yang Siyi Guo Tom Lawson Bingyang Shi Chunpeng Song State Key Laboratory of Cotton Biology Key Laboratory of Plant Stress Biology School of Life SciencesHenan University Key Laboratory for Special Functional Materials of Ministry of Education Henan University International Joint Centre for Biomedical Innovation School of Life Sciences Henan University ARC Centre of Nanoscale Biophotonics Macquarie University

Surface plasmon resonance(SPR) nanosensors based on metallic nanohole arrays have been widely reported to detect binding interactions in biological specimens. A simple and effective method for constructing nanoscale arrays is essential for the development of SPR nanosensors. In this work, we report a one-step method to fabricate nanohole arrays by thermal nanoimprinting in the matrix of IPS(Intermediate Polymer Stamp). No additional etching process or supporting substrate is required. The preparation process is simple, time-saving and compatible for roll-to-roll process, potentially allowing mass production. Moreover, the nanohole arrays were integrated into detection platform as SPR sensors to investigate different types of biological binding interactions. The results demonstrate that our one-step method can be used to efficiently fabricate large-area and uniform nanohole arrays for biochemical sensing.

关键词： gold nanohole arrays one-step method nanoimprinting nanosensor biomolccular binding

Electrically induced nanostructuring over large area——a new idea from concept to practice

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Engineering Sciences 2013年第1期11卷 23-28,38页

作者： Li Xiangming Ding Yucheng Shao Jinyou Liu Hongzhong School of Mechanical Engineering Xi'an Jiaotong University State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University

The paper proposes a novel nano-patterning method called electrically induced nanostructuring, where an external electric field, insteadof the external mechanical pressure, is applied to generate an electrohydrody- namic force acting on the polymer-air interface to drive the polymer＇ s flow into the mold cavities. This electri- cally induced nanostrueturing method no longer requires a large mechanical pressure externally applied for actua- ting the polymer filling in the mold cavities, and has been used to successfully fabricate micro/nano pillar arrays of a high aspect ratio （up to 10）, which have been usually considered to be ＂difficult to fabricate＂ by conventional molding or nanoimprinting processes.

关键词： nano-manufacturing electrohydrodynamic force high aspect ratio nanoimprinting

Nano-and Micro-patterned Biomaterials

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复旦学报（自然科学版） 2007年第5期46卷 706-页

作者： M.C.Lensen M.Diez V.A.Schulte P.Mela M.Mller DWI e.V.and Institute of Technical and Macromolecular Chemistry RWTH AachenGermany

1 Results Our objective is two fold: we (ⅰ) aim at the development of novel patterning methodologies in order to (ⅱ) achieve control over the positioning and alignment of living *** patterning of the biointerfaces is carried out both at the micro-and nanometer scale and involve (bio)chemical as well as topographic *** former are relatively easily obtained by patterning techniques adapted from (conventional) soft lithography,*** means of micro-contact printing (μ-CP).The topographic pat...

关键词： soft lithography hydrogels nanoimprinting UV-curing cell adhesion