检索结果-内蒙古大学图书馆

SSRN 2021年

作者： Sun, Bangyong Zhao, Yi Wu, Weimin Zhao, Qiang Li, Gang Key Laboratory of Optoelectronic Technology and Systems Ministry of Education Defence Key Disciplines Lab of Novel Micro-Nano Devices and System Technology Chongqing University Chongqing400044 China Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment Chongqing University Cancer Hospital Chongqing400030 China School of Mechanical and Power Engineering Chongqing University of Science and Technology Chongqing401331 China

Hanging drop (HD) is one of the most popular methods used for forming three-dimensional (3D) cell spheroids. However, conventional hanging drop systems are only applicable for short-term spheroid culture due to their inconvenience in exchanging cell culture media. Here we present a medium-reservoir-integrated superhydrophobic (MRI-SH) chip for long-term HD spheroid cultures. The device consists of two main components: i) a patterned superhydrophobic (SH) surface containing an array of wettable spots which anchor arrays of droplets of cell suspension, and ii) an array of chambers that serve as medium reservoirs, both interconnected via an array of thru-holes. This configuration provides two distinct advantages over conventional HD configurations: i) the high wettability contrast of the SH pattern on the chip leads to the formation and adhesion of nearly spherical hanging droplets on its surface, which minimizes interactions between the liquid and the substrate;ii) the integrated chambers provide large volumes of medium to maintain longer culture durations. Using this device, spheroids of MHCC97H cells were successfully formed, and the cultured spheroids could maintain high viability for up to 30 days and exhibited enhanced spheroid morphology compared to those cultured in the conventional HD systems. © 2021, The Authors. All rights reserved.

关键词： Drops

来源：评论

学校读者我要写书评

暂无评论

Towards ultrafast cooling through transient phonon currents: A closed-form solution

引用

Physical Review B 2021年第7期103卷 075427-075427页

作者： Xiaobin Chen Jiangtao Yuan Jian Wang School of Science State Key Laboratory on Tunable laser Technology and Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Harbin Institute of Technology Shenzhen Shenzhen 518055 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China Department of Physics and the Center of Theoretical and Computational Physics The University of Hong Kong Hong Kong China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China

We develop a closed-form formula to calculate the transient thermal currents flowing through an arbitrary nanoscale phonon device in response to a sudden thermal switch. Our theory provides a solution to the problem in the far-from-equilibrium nonlinear response regime beyond the wide-band-like approximation and Drude regularization. We present calculations in a one-dimensional monatomic chain with Lorentzian-like thermal baths and show that the transient phonon currents are significantly larger than the long-time-limit steady-state phonon current. From the formula's clear mathematical structure, we also show that the transient oscillation periodicity and relaxation time are determined by the poles of the retarded phonon Green's function. In addition, higher temperatures of the thermal baths and stronger coupling between the baths and the central monatomic chain result in higher transient thermal currents. Our results suggest that ultrafast cooling of nanodevices through transient phonon currents is a promising route.

关键词： Ballistic transport Phonons Quantum transport Nonequilibrium Green's function

来源：评论

学校读者我要写书评

暂无评论

Midgap states induced by Zeeman field and p wave superconductor pairing

arXiv

引用

arXiv 2023年

作者： Jin, Yuanjun Yue, XingYu Xu, Yong Yu, Xiang-Long Chang, Guoqing Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics South China Normal University Guangzhou510006 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Physics Department Guangdong-Hong Kong Joint Laboratory of Quantum Matter The University of Hong Kong Pokfulam Road Hong Kong Institute of Micro/Nano Materials and Devices Ningbo University of Technology Zhejiang Ningbo315016 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China International Quantum Academy Shenzhen518048 China

The one-dimensional Su-Schrieffer-Heeger (SSH) model is central to band topology in condensed matter physics, which allows us to understand and design distinct topological states. In this work, we find another mechanism to analogize the SSH model in a spinful system, realizing an obstructed atomic insulator by introducing intrinsic spin-orbit coupling and in-plane Zeeman field. In our model, the midgap states originate from a quantized hidden polarization with invariant index Z2 (0;01) due to the local inversion symmetry breaking. When the global inversion symmetry is broken, a charge pumping is designed by tuning the polarization. Moreover, by introducing the p + ip superconductor pairing potential, a new topological phase dubbed obstructed superconductor (OSC) is identified. This new state is characterized by invariant index Z2 (0;01) and nonchiral midgap states. More interestingly, these nonchiral edge states result in a chiral-like nonlocal conductance, which is different from the traditional chiral topological superconductor. Our findings not only find another strategy to achieve a spinful SSH model but also predict the existence of OSC, providing a promising avenue for further exploration of its transport properties. Copyright © 2023, The Authors. All rights reserved.

关键词： Superconducting materials

来源：评论

学校读者我要写书评

暂无评论

Recent Advances in Monolithic Nonplanar Ring Oscillators

Recent Advances in Monolithic Nonplanar Ring Oscillators

引用

International Conference on Transparent Optical Networks

作者： Guoping Lin Yaqin Cao Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System School of Science Harbin Institute of Technology Shenzhen China MOE Key Laboratory of Fundamental Physical Quantities Measurement PGMF and School of Physics Huazhong University of Science and Technology Wuhan China

ISBN: (数字)9781728184234

ISBN: (纸本)9781728184241

Monolithic nonplanar ring oscillators are reliable narrow-linewidth continuous-wave laser sources in fundamental researches and practical applications, which have been successfully used in several satellite missions. In this talk, we report on recent developments on such laser sources. We show that high order Laguerre-Gaussian modes carrying orbital angular momentum can emit directly using a regular Gaussian pump beam. In particular, we demonstrate that these oscillators can work not only in the single-frequency lasing regime but also in the dual-frequency lasing regime with low phase noise performance.

关键词： Laser beams Laser modes Pump lasers Laser excitation Surface emitting lasers Laser noise

来源：评论

学校读者我要写书评

暂无评论

Recent Advances in Triboelectric nanogenerators: From Technological Progress to Commercial Applications

引用

ACS nano 2023年第12期17卷 11087-11219页

作者： Choi, Dongwhi Lee, Younghoon Lin, Zong-Hong Cho, Sumin Kim, Miso Ao, Chi Kit Soh, Siowling Sohn, Changwan Jeong, Chang Kyu Lee, Jeongwan Lee, Minbaek Lee, Seungah Ryu, Jungho Parashar, Parag Cho, Yujang Ahn, Jaewan Kim, Il-Doo Jiang, Feng Lee, Pooi See Khandelwal, Gaurav Kim, Sang-Jae Kim, Hyun Soo Song, Hyun-Cheol Kim, Minje Nah, Junghyo Kim, Wook Menge, Habtamu Gebeyehu Park, Yong Tae Xu, Wei Hao, Jianhua Park, Hyosik Lee, Ju-Hyuck Lee, Dong-Min Kim, Sang-Woo Park, Ji Young Zhang, Haixia Zi, Yunlong Guo, Ru Cheng, Jia Yang, Ze Xie, Yannan Lee, Sangmin Chung, Jihoon Oh, Il-Kwon Kim, Ji-Seok Cheng, Tinghai Gao, Qi Cheng, Gang Gu, Guangqin Shim, Minseob Jung, Jeehoon Yun, Changwoo Zhang, Chi Liu, Guoxu Chen, Yufeng Kim, Suhan Chen, Xiangyu Hu, Jun Pu, Xiong Guo, Zi Hao Wang, Xudong Chen, Jun Xiao, Xiao Xie, Xing Jarin, Mourin Zhang, Hulin Lai, Ying-Chih He, Tianyiyi Kim, Hakjeong Park, Inkyu Ahn, Junseong Huynh, Nghia Dinh Yang, Ya Wang, Zhong Lin Baik, Jeong Min Choi, Dukhyun Kyung Hee University Gyeonggi Yongin17104 Korea Republic of Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Department of Mechanical Engineering Soft Robotics Research Center Seoul National University Seoul08826 Korea Republic of Department of Mechanical Engineering Gachon University Seongnam13120 Korea Republic of Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon16419 Korea Republic of Sungkyunkwan University 2066 Seobu-ro Gyeonggi Suwon16419 Korea Republic of Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 117585 Singapore Division of Advanced Materials Engineering Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Department of Physics Inha University 100 Inha-ro Incheon22212 Korea Republic of School of Materials Science & Engineering Yeungnam University Gyeongbuk Gyeongsan38541 Korea Republic of 291 Daehak-ro Daejeon34141 Korea Republic of School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Institute of Flexible Electronics Technology of Tsinghua Zhejiang Jiaxing314000 China Nanomaterials and System Lab Major of Mechatronics Engineering Faculty of Applied Energy System Jeju National University Jeju632-43 Korea Republic of School of Engineering University of Glasgow GlasgowG128QQ United Kingdom Seoul02792 Korea Republic of Department of Physics Inha University Incheon22212 Korea Republic of Suwon16419 Korea Republic of Department of

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will serve as a key solution in the near future. Among them, triboelectric nanogenerators (TENGs), which is one of the most promising mechanical energy harvesters by means of contact electrification phenomenon, are explosively developing due to abundant wasting mechanical energy sources and a number of superior advantages in a wide availability and selection of materials, relatively simple device configurations, and low-cost processing. Significant experimental and theoretical efforts have been achieved toward understanding fundamental behaviors and a wide range of demonstrations since its report in 2012. As a result, considerable technological advancement has been exhibited and it advances the timeline of achievement in the proposed roadmap. Now, the technology has reached the stage of prototype development with verification of performance beyond the lab scale environment toward its commercialization. In this review, distinguished authors in the world worked together to summarize the state of the art in theory, materials, devices, systems, circuits, and applications in TENG fields. The great research achievements of researchers in this field around the world over the past decade are expected to play a major role in coming to fruition of unexpectedly accelerated technological advances over the next decade. © 2023 The Authors. Published by American Chemical Society

关键词： nanogenerators

来源：评论

学校读者我要写书评

暂无评论

Transverse Patterns and Dual-Frequency Lasing in a Low-Noise Nonplanar-Ring Orbital-Angular-Momentum Oscillator

引用

Physical Review Applied 2020年第2期13卷 024067-024067页

作者： Yaqin Cao Ping Liu Cuifang Hou Yanne K. Chembo Zehuang Lu Guoping Lin MOE Key Laboratory of Fundamental Physical Quantities Measurement Hubei Key Laboratory of Gravitation and Quantum Physics PGMF and School of Physics Huazhong University of Science and Technology Wuhan 430074 China Institute for Research in Electronics and Applied Physics (IREAP) and Department of Electrical and Computer Engineering University of Maryland College Park Maryland 20742 USA Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System School of Science Harbin Institute of Technology Shenzhen 518055 China

Monolithic optical cavities employing total internal reflections are appealing compact platforms for a wide range of applications from fundamental physics to industry applications. We characterize the transverse patterns of a millimeter-size monolithic nonplanar ring vortex laser pumped by a Gaussian beam. Vortex beams carrying orbital angular momentum (OAM) up to 30 together with vortex crystals and petal patterns are observed. The rigid nature of the monolithic cavity brings along its low-noise lasing performance for these beams. A frequency noise floor as low as 0.1Hz/Hz1/2 corresponding to sub-Hz instantaneous linewidth is measured. Furthermore, we demonstrate low-noise dual-frequency lasing with phase noise as low as −118dBc/Hz at 10-kHz offset for the beatnote at 8.2 GHz. We expect that such versatile and compact OAM laser sources can facilitate multiple applications including optical communications, optical tweezers, and laser metrology such as dual-frequency Doppler lidar.

关键词： Angular momentum of light Optical quantum information processing Optical sources & detectors Optical vortices Photonics Solid state lasers Spatial profiles of optical beams Cavity resonators

来源：评论

学校读者我要写书评

暂无评论

A Silicon Neural Optrode with Noise Mitigation Structure for High-Fidelity Neural Recording

SSRN

引用

SSRN 2022年

作者： Wang, Minghao Ji, Bowen Wang, Longchun Fan, Ye Jin, Minyi Xu, Jiahui Shang, Siyan Ni, Chuner Hu, Yili Cheng, Yuhua Dong, Linxi Liu, Jing-Quan Wang, Gaofeng MOE Engineering Research Center of Smart Microsensors and Microsystems School of Electronics and Information Hangzhou Dianzi University Hangzhou310018 China National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University Shanghai200240 China The Unmanned System Research Institute Northwestern Polytechnical University Xi’an710060 China The Institute of Precision Machinery and Smart Structure Key Laboratory of Intelligent Operation and Maintenance Technology Equipment for Urban Rail Transit of Zhejiang Province College of Engineering Zhejiang Normal University Yinbin Street 688 Jinhua321004 China

In recent years, optogenetic-based neural regulation technology has attracted extensive attention. The optrode integrated with optical stimulating micro-laser diode (LD)/light emitting diode (LED) and electrical recording microelectrodes presents significant advantages. However, the performance of the neural optrode is still hindered by high amplitude noise generated by micro-LD/LED and silicon substrate. A silicon optrode with heavy doped silicon probes, ground shielded LD and electrochemical modified microelectrodes is herein developed for low-noise and high-fidelity optical modulation. Firstly, the optoelectronic integration is realized by adopting LD-coupled optical fiber module that can avoid fiber tangle and tissue heating. Secondly, the electrochemical performance is significantly improved to two orders of magnitude by electrodeposition of Pt Black (PBK)/conductive polymer double layer on gold microelectrodes. Thirdly, the low-noise recording is achieved by combination of heavy doping, electrochemical modification, electromagnetic shielding and transient pulse shaping of the optrode. Furthermore, the in-vivo acute recording experiments show that the light-induced photoelectric noise has little influence on the firing rate and SNR (signal to noise) of the recorded signals accompanied by optical stimulation. The results indicate that this device is a promising optogenetic tool for the research of local neural circuits. © 2022, The Authors. All rights reserved.

关键词： microelectrodes

来源：评论

学校读者我要写书评

暂无评论

Atomic-scale understanding of enhanced polarization of highly strained nanoscale columnar PbTiO3

引用

Physical Review B 2021年第18期104卷 184111-184111页

作者： Y. Z. Dai L. Lu F. Zhang L. Jin Y. Jiang D. W. Wang Z. P. Li C.-L. Jia State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China School of Microelectronics & Key Lab of Micro-Nano Electronics and System Integration of Xi'an City Xi'an Jiaotong University Xi'an 710049 China Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C) Forschungszentrum Jülich GmbH 52425 Jülich Germany School of Materials Science and Engineering Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 China

Spontaneous polarization in displacive ferroelectric oxides originates from the separation of positive charge centers from negative charge centers, which is induced by the off-center displacements of cations and anions in unit cells. For hugely strained ferroelectric oxides, understanding the correlation between the off-center displacements and the strain level is a prerequisite for understanding the polarization behavior. In the present work, the off-center displacements of atoms in nanometer columnar PbTiO3 under a strong tensile strain of 13% along the c -axis direction are quantified by quantitative high-resolution transmission electron microscopy. The measured off-center displacement ΔTi−O (0.052 nm) is about 60% larger than the value of unstrained bulk PbTiO3. The experimental results are confirmed by first-principle calculations, leading to a polarization of 122μC/cm2, providing the basis for understanding the enhanced spontaneous polarization of highly strained displacive ferroelectric oxides.

关键词： Electric polarization Ferroelectricity First-principles calculations microstructure Phase separation Ferroelectrics Thin films Density functional calculations Scanning transmission electron microscopy Strain engineering

来源：评论

学校读者我要写书评

暂无评论

Enhanced phase-transfer kinetics achieved by atomic iron catalysts on hard carbon toward low-temperature sodium-ion batteries

引用

Chemical Engineering Journal 2025年

作者： Xinyi Qian Ziling Wu Jianan Gu Yanli Wang Xiaomin Cheng Jing Zhang Hongzhen Lin Jian Wang Liang Zhan Yongzheng Zhang State Key Laboratory of Green Chemical Engineering and Industrial Catalysis State Key Laboratory of Chemical Engineering Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education) Shanghai Key Laboratory of Multiphase Materials Chemical Engineering East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New Energy North China Electric Power University Beijing 100096 China i-Lab & CAS Key Laboratory of Nanophotonic Materials and Device Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 China School of Materials Science and Engineering Xi’an University of Technology Xi’an 710048 China Helmholtz Institute Ulm (HIU) Ulm D89081 Germany Karlsruhe Institute of Technology (KIT) Karlsruhe D76021 Germany

Hard carbons with desirable pore morphologies are the most promising anode materials for sodium-ion batteries, but experience undesirable cycling stability and depressed capacity owing to sluggish reaction kinetics of sodium-related species through or across the carbon layer. Herein, based on closed pore morphology engineering using carbon dioxide physical activation method, the hard carbon composite (SAFe@HC) was prepared by coating a polydopamine capping layer with uniformly distributed iron single atoms on the closed-pore-rich hard carbon, where the introduction SAFe help to expand the layer spacing distance, providing additional channels for solvated Na + diffusion. It is innovatively proposed that SAFe catalysts provide abundant active catalytic sites for accelerating the interfacial desolvation and the phase-transfer kinetics of Na + is lowered by decreasing the sodium ion transport energy barrier, as confirmed by theoretical simulation and various electrochemical demonstration. In addition, the closed pore morphology also enhances the surface area and adsorbs more sodium ions. As a result, the SAFe@HC electrode exhibits a high reversible capacity of 340.7 mAh g −1 and a remarkable rate capacity up to 306.2 mAh g −1 and a high capacity-retention of 96.0 % after 500 cycles at 5C. Decreasing the environmental temperature to 0 °C, an excellent robust electrochemical performance of 172.2 mAh g −1 at 5C, offering promising avenues of single atomic catalysts achieving high-rate hard carbon electrode for sodium-ion batteries.

关键词：

来源：评论

学校读者我要写书评

暂无评论

二维/三维异质结构的纳米级相管理以实现高效的钙钛矿太阳能电池（英文）

引用

science Bulletin 2024年第18期 2853-2861页

作者：顾浩朱桉楠夏俊民李旺郑嘉豪杨涛李胜文张楠梅时良蔡永青陈石梁超邢贵川 Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts & Telecommunications (NUPT) MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Physics National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology Xi'an Jiaotong University Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology Institute for Electric Light Sources School of Information Science and Technology Fudan University

The stabilization of the formamidinium lead iodide （FAPbⅠ3） structure is pivotal for the development of efficient photovoltaic *** two-dimensional （2D） layers to passivate the threedimensional （3D） perovskite is essential for maintaining the a-phase of FAPb Ⅰ3and enhancing the power conversion efficiency （PCE） of perovskite solar cells （PSCs）.However,the role of bulky ligands in the phase management of 2D perovskites,crucial for the stabilization of FAPbⅠ3,has not yet been *** this study,we synthesized nanoscale 2D perovskite capping crusts with

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：