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Zhang Z, Wu B, Wang Y, Cai T, Ma M, You C, Liu C, Jiang G, Hu Y, Li X, Chen XZ, Song E, Cui J, Huang G, Kiravittaya S, Mei Y. Multilevel design and construction in nanomembrane rolling for three-dimensional angle-sensitive photodetection. Nat Commun 2024; 15:3066. [PMID: 38594254 PMCID: PMC11004118 DOI: 10.1038/s41467-024-47405-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 04/01/2024] [Indexed: 04/11/2024] Open
Abstract
Releasing pre-strained two-dimensional nanomembranes to assemble on-chip three-dimensional devices is crucial for upcoming advanced electronic and optoelectronic applications. However, the release process is affected by many unclear factors, hindering the transition from laboratory to industrial applications. Here, we propose a quasistatic multilevel finite element modeling to assemble three-dimensional structures from two-dimensional nanomembranes and offer verification results by various bilayer nanomembranes. Take Si/Cr nanomembrane as an example, we confirm that the three-dimensional structural formation is governed by both the minimum energy state and the geometric constraints imposed by the edges of the sacrificial layer. Large-scale, high-yield fabrication of three-dimensional structures is achieved, and two distinct three-dimensional structures are assembled from the same precursor. Six types of three-dimensional Si/Cr photodetectors are then prepared to resolve the incident angle of light with a deep neural network model, opening up possibilities for the design and manufacturing methods of More-than-Moore-era devices.
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Affiliation(s)
- Ziyu Zhang
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Binmin Wu
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Yang Wang
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Tianjun Cai
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Mingze Ma
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Chunyu You
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Chang Liu
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Guobang Jiang
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Yuhang Hu
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Xing Li
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
| | - Xiang-Zhong Chen
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, People's Republic of China
- Yiwu Research Institute of Fudan University, Yiwu, 322000, Zhejiang, People's Republic of China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, People's Republic of China
| | - Enming Song
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, People's Republic of China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, People's Republic of China
| | - Jizhai Cui
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, People's Republic of China
| | - Gaoshan Huang
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China
- Yiwu Research Institute of Fudan University, Yiwu, 322000, Zhejiang, People's Republic of China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, People's Republic of China
| | - Suwit Kiravittaya
- Department of Electrical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Yongfeng Mei
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, People's Republic of China.
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, People's Republic of China.
- Yiwu Research Institute of Fudan University, Yiwu, 322000, Zhejiang, People's Republic of China.
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, People's Republic of China.
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Wu B, Zhang Z, Zheng Z, Cai T, You C, Liu C, Li X, Wang Y, Wang J, Li H, Song E, Cui J, Huang G, Mei Y. Self-Rolled-Up Ultrathin Single-Crystalline Silicon Nanomembranes for On-Chip Tubular Polarization Photodetectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306715. [PMID: 37721970 DOI: 10.1002/adma.202306715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/09/2023] [Indexed: 09/20/2023]
Abstract
Freestanding single-crystalline nanomembranes and their assembly have broad application potential in photodetectors for integrated chips. However, the release and self-assembly process of single-crystalline semiconductor nanomembranes still remains a great challenge in on-chip processing and functional integration, and photodetectors based on nanomembrane always suffer from limited absorption of nanoscale thickness. Here, a non-destructive releasing and rolling process is employed to prepare tubular photodetectors based on freestanding single-crystalline Si nanomembranes. Spontaneous release and self-assembly are achieved by residual strain introduced by lattice mismatch at the epitaxial interface of Si and Ge, and the intrinsic stress and strain distributions in self-rolled-up Si nanomembranes are analyzed experimentally and computationally. The advantages of light trapping and wide-angle optical coupling are realized by tubular geometry. This Si microtube device achieves reliable Ohmic contact and exhibits a photoresponsivity of over 330 mA W-1 , a response time of 370 µs, and a light incident detection angle range of over 120°. Furthermore, the microtubular structure shows a distinct polarization angle-dependent light absorption, with a dichroic ratio of 1.24 achieved at 940 nm. The proposed Si-based microtubes provide new possibilities for the construction of multifunctional chips for integrated circuit ecosystems in the More than Moore era.
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Affiliation(s)
- Binmin Wu
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Ziyu Zhang
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Zhi Zheng
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Tianjun Cai
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Chunyu You
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Chang Liu
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Xing Li
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Yang Wang
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Jinlong Wang
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Hongbin Li
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
| | - Enming Song
- Yiwu Research Institute of Fudan University, Yiwu, 322000, P. R. China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, P. R. China
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, P. R. China
| | - Jizhai Cui
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
- Yiwu Research Institute of Fudan University, Yiwu, 322000, P. R. China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, P. R. China
| | - Gaoshan Huang
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
- Yiwu Research Institute of Fudan University, Yiwu, 322000, P. R. China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, P. R. China
| | - Yongfeng Mei
- Department of Materials Science & State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200438, P. R. China
- Yiwu Research Institute of Fudan University, Yiwu, 322000, P. R. China
- International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, P. R. China
- Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, P. R. China
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3
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Wang S, Yan P, Huang H, Zhang N, Li B. Inflatable Metamorphic Origami. RESEARCH (WASHINGTON, D.C.) 2023; 6:0133. [PMID: 37228636 PMCID: PMC10204744 DOI: 10.34133/research.0133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 04/11/2023] [Indexed: 05/27/2023]
Abstract
This study created a new type of inflatable metamorphic origami that has the advantage of being a highly simplified deployable system capable of realizing multiple sequential motion patterns with a monolithic actuation. The main body of the proposed metamorphic origami unit was designed as a soft inflatable metamorphic origami chamber with multiple sets of contiguous/collinear creases. In response to pneumatic pressure, the metamorphic motions are characterized by an initial unfolding around the first set of contiguous/collinear creases followed by another unfolding around the second set of contiguous/collinear creases. Furthermore, the effectiveness of the proposed approach was verified by constructing a radial deployable metamorphic origami for supporting the deployable planar solar array, a circumferential deployable metamorphic origami for supporting the deployable curved-surface antenna, a multi-fingered deployable metamorphic origami grasper for grasping large-sized objects, and a leaf-shaped deployable metamorphic origami grasper for capturing heavy objects. The proposed novel metamorphic origami is expected to serve as a foundation for designing lightweight, high-deploy/fold-ratio, low-energy-consumption space deployable systems.
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Affiliation(s)
- Sen Wang
- School of Mechanical Engineering and Automation,
Harbin Institute of Technology, Shenzhen 518052, P.R. China
| | - Peng Yan
- School of Mechanical Engineering and Automation,
Harbin Institute of Technology, Shenzhen 518052, P.R. China
| | - Hailin Huang
- School of Mechanical Engineering and Automation,
Harbin Institute of Technology, Shenzhen 518052, P.R. China
- Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics,
Harbin Institute of Technology, Shenzhen 518052, P. R. China
| | - Ning Zhang
- School of Mechanical Engineering and Automation,
Harbin Institute of Technology, Shenzhen 518052, P.R. China
| | - Bing Li
- School of Mechanical Engineering and Automation,
Harbin Institute of Technology, Shenzhen 518052, P.R. China
- Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics,
Harbin Institute of Technology, Shenzhen 518052, P. R. China
- State Key Laboratory of Robotics and System,
Harbin Institute of Technology, Harbin 150001, P.R. China
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4
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Self-rolling of vanadium dioxide nanomembranes for enhanced multi-level solar modulation. Nat Commun 2022; 13:7819. [PMID: 36535951 PMCID: PMC9763237 DOI: 10.1038/s41467-022-35513-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022] Open
Abstract
Thermochromic window develops as a competitive solution for carbon emissions due to comprehensive advantages of its passivity and effective utilization of energy. How to further enhance the solar modulation ([Formula: see text]) of thermochromic windows while ensuring high luminous transmittance ([Formula: see text]) becomes the latest challenge to touch the limit of energy efficiency. Here, we show a smart window combining mechanochromism with thermochromism by self-rolling of vanadium dioxide (VO2) nanomembranes to enhance multi-level solar modulation. The mechanochromism is introduced by the temperature-controlled regulation of curvature of rolled-up smart window, which benefits from effective strain adjustment in VO2 nanomembranes upon the phase transition. Under geometry design and optimization, the rolled-up smart window with high [Formula: see text] and [Formula: see text] is achieved for the modulation of indoor temperature self-adapted to seasons and climate. Furthermore, such rolled-up smart window enables high infrared reflectance after triggered phase transition and acts as a smart lens protective cover for strong radiation. This work supports the feasibility of self-rolling technology in smart windows and lens protection, which promises broad interest and practical applications of self-adapting devices and systems for smart building, intelligent sensors and actuators with the perspective of energy efficiency.
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5
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Wang X, Wang Z, Dong H, Saggau CN, Tang H, Tang M, Liu L, Baunack S, Bai L, Liu J, Yin Y, Ma L, Schmidt OG. Collective Coupling of 3D Confined Optical Modes in Monolithic Twin Microtube Cavities Formed by Nanomembrane Origami. NANO LETTERS 2022; 22:6692-6699. [PMID: 35939782 DOI: 10.1021/acs.nanolett.2c02083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report the monolithic fabrication of twin microtube cavities by a nanomembrane origami method for achieving collective coupling of 3D confined optical modes. Owing to the well-aligned twin geometries, two sets of 3D confined optical modes in twin microtubes are spectrally and spatially matched, by which both the fundamental and higher-order axial modes are respectively coupled with each other. Multiple groups of the coupling modes provide multiple effective channels for energy exchange between coupled microcavities illustrated by the measured spatial optical field distributions. The spectral anticrossing and changing-over features of each group of coupled modes are revealed in experiments and calculations, indicating the occurrence of strong coupling. In addition, the simulated 3D mode profiles of twin microcavities confirm the collective strong coupling behavior, which shows good agreement with experiments. The collective coupling of 3D confined resonant modes promises broad applications in multichannel optical signal processing, nanophotonics, and 3D non-Hermitian systems.
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Affiliation(s)
- Xiaoyu Wang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
- Faculty of Physics, TU Dresden, 01062 Dresden, Germany
| | - Zhen Wang
- State Key Laboratory of Marine Resources Utilization in South China Sea, Key Laboratory of Research on Utilization of Si-Zr-Ti Resources of Hainan Province, School of Materials Science and Engineering, Hainan University, 570228 Haikou, China
| | - Haiyun Dong
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | | | - Hongmei Tang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
- Material Systems for Nanoelectronics, TU Chemnitz, 09107 Chemnitz, Germany
- Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), TU Chemnitz, 09126 Chemnitz, Germany
| | - Min Tang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Lixiang Liu
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Stefan Baunack
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Ling Bai
- School of Materials Science and Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Junlin Liu
- School of Materials Science and Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Yin Yin
- School of Materials Science and Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Libo Ma
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Oliver G Schmidt
- Faculty of Physics, TU Dresden, 01062 Dresden, Germany
- Material Systems for Nanoelectronics, TU Chemnitz, 09107 Chemnitz, Germany
- Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), TU Chemnitz, 09126 Chemnitz, Germany
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6
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Wang W, Wu Z, Yang L, Si T, He Q. Rational Design of Polymer Conical Nanoswimmers with Upstream Motility. ACS NANO 2022; 16:9317-9328. [PMID: 35576530 DOI: 10.1021/acsnano.2c01979] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Utilizing bottom-up controllable molecular assembly, the bio-inspired polyelectrolyte multilayer conical nanoswimmers with gold-nanoshell functionalization on different segments are presented to achieve the optimal upstream propulsion performance. The experimental investigation reveals that the presence of the gold nanoshells on the big openings of the nanoswimmers could not only bestow efficient directional propulsion but could also minimize the impact from the external flow. The gold nanoshells at the big openings of nanoswimmers facilitate the acoustically powered propulsion against a flow velocity of up to 2.00 mm s-1, which is higher than the blood velocity in capillaries and thus provides a proof-of-concept design for upstream nanoswimmers.
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Affiliation(s)
- Wei Wang
- Wenzhou Institute, University of Chinese Academy of Sciences, 1 Jinlian Street, Wenzhou 325000, China
| | - Zhiguang Wu
- Key Laboratory of Micro-systems and Micro-structures Manufacturing (Ministry of Education), Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150080, China
| | - Ling Yang
- Wenzhou Institute, University of Chinese Academy of Sciences, 1 Jinlian Street, Wenzhou 325000, China
| | - Tieyan Si
- Key Laboratory of Micro-systems and Micro-structures Manufacturing (Ministry of Education), Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150080, China
| | - Qiang He
- Wenzhou Institute, University of Chinese Academy of Sciences, 1 Jinlian Street, Wenzhou 325000, China
- Key Laboratory of Micro-systems and Micro-structures Manufacturing (Ministry of Education), Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150080, China
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7
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Zhao Y, You H, Li X, Pei C, Huang X, Li H. Solvent-Free Preparation of Closely Packed MoS 2 Nanoscrolls for Improved Photosensitivity. ACS APPLIED MATERIALS & INTERFACES 2022; 14:9515-9524. [PMID: 35133788 DOI: 10.1021/acsami.1c24291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Due to their enhanced light absorption efficiency, one-dimensional (1D) transition metal dichalcogenide (TMDC) nanoscrolls derived from two-dimensional (2D) TMDC nanosheets have shown excellent optoelectronic properties. Currently, organic solvent and alkaline droplet-assisted scrolling methods are popular for preparing TMDC nanoscrolls. Unfortunately, the adsorption of organic solvent or alkaline impurities on TMDC is inevitable during the preparation, which affects the optoelectronic properties of TMDC. In this work, we report a solvent-free method to prepare closely packed MoS2 nanoscrolls by dragging a deionized water droplet onto the chemical vapor deposition grown monolayer MoS2 nanosheets at 100 °C (referred to as MoS2 NS-W). The as-prepared MoS2 NS-W was well characterized by optical microscopy, atomic force microscopy, and ultralow frequency (ULF) Raman spectroscopy. After high temperature annealing, the height of MoS2 nanoscrolls prepared using an ethanol droplet (referred to as MoS2 NS-E) greatly decreased, indicating the loss of encapsulated ethanol in MoS2 NS-E. While the height of MoS2 NS-W was almost unchanged under the same conditions, implying that no water was embedded in the scroll. Compared to the MoS2 NS-E, the MoS2 NS-W shows more ULF breathing mode peaks, confirming the stronger interlayer interaction. In addition, the MoS2 NS-W shows a higher Young's modulus than MoS2 NS-E, which could arise from the closely packed scroll structure. Importantly, the MoS2 NS-W device showed a photosensitivity 1 order of magnitude higher than that of the MoS2 NS-E device under blue, green, and red lasers, respectively. The decreased photosensitivity of MoS2 NS-E was attributed to the larger dark current, which might be assigned to the adsorbed ethanol between the adjacent layers in MoS2 NS-E. Our work provides a solvent-free method to prepare closely packed MoS2 nanoscrolls at large scale and demonstrates their great potential for high-performance optoelectronic devices.
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Affiliation(s)
- Ying Zhao
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
| | - Hui You
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xinzhe Li
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
| | - Chengjie Pei
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xiao Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
| | - Hai Li
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, P. R. China
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8
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Ma Z, Tian Z, Li X, You C, Wang Y, Mei Y, Di Z. Self-Rolling of Monolayer Graphene for Ultrasensitive Molecular Sensing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:49146-49152. [PMID: 34617726 DOI: 10.1021/acsami.1c12592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The controllable manipulation of graphene to create three-dimensional (3D) structures is an intriguing approach for favorably tuning its properties and creating new types of 3D devices. However, due to extremely low bending stiffnesses, it is rather challenging to construct monolayer graphene into stable 3D structures. Here, we demonstrate the stable formation of monolayer graphene microtubes with accompanying pre-patterned strain layers. The diameter of graphene microtubes can be effectively tuned by changing the thickness of the strain layers. Benefiting from a high surface-to-volume ratio of the tubular geometry, the 3D geometry leads to a prominent Raman enhancement, which was further applied to molecular sensing. The R6G molecules on graphene microtubes can be detected even for a concentration as low as 10-11 M. We believe that this method can be a generalized way to realize the 3D tubular structure of other 2D materials.
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Affiliation(s)
- Zhe Ma
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ziao Tian
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xing Li
- Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 200433, China
| | - Chunyu You
- Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 200433, China
| | - Yalan Wang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongfeng Mei
- Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 200433, China
| | - Zengfeng Di
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
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9
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Chen Q, Lv P, Huang J, Huang TY, Duan H. Intelligent Shape-Morphing Micromachines. RESEARCH (WASHINGTON, D.C.) 2021; 2021:9806463. [PMID: 34056618 PMCID: PMC8139332 DOI: 10.34133/2021/9806463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/11/2021] [Indexed: 11/06/2022]
Abstract
Intelligent machines are capable of switching shape configurations to adapt to changes in dynamic environments and thus have offered the potentials in many applications such as precision medicine, lab on a chip, and bioengineering. Even though the developments of smart materials and advanced micro/nanomanufacturing are flouring, how to achieve intelligent shape-morphing machines at micro/nanoscales is still significantly challenging due to the lack of design methods and strategies especially for small-scale shape transformations. This review is aimed at summarizing the principles and methods for the construction of intelligent shape-morphing micromachines by introducing the dimensions, modes, realization methods, and applications of shape-morphing micromachines. Meanwhile, this review highlights the advantages and challenges in shape transformations by comparing micromachines with the macroscale counterparts and presents the future outlines for the next generation of intelligent shape-morphing micromachines.
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Affiliation(s)
- Qianying Chen
- State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
- CAPT, HEDPS, Peking University, Beijing 100871, China
| | - Pengyu Lv
- State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Jianyong Huang
- State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Tian-Yun Huang
- State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Huiling Duan
- State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
- CAPT, HEDPS, Peking University, Beijing 100871, China
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10
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Chen G, Hao B, Wang Y, Wang Y, Xiao H, Li H, Huang X, Shi B. Insights into Regional Wetting Behaviors of Amphiphilic Collagen for Dual Separation of Emulsions. ACS APPLIED MATERIALS & INTERFACES 2021; 13:18209-18217. [PMID: 33845568 DOI: 10.1021/acsami.0c22601] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Industrial manufacture generates a huge quantity of emulsion wastewater, which causes serious threats to the aquatic ecosystems. Water-in-oil (W/O) and oil-in-water (O/W) emulsions are two major types of emulsions discharged by industries. However, dual separation of W/O and O/W emulsions remains a challenging issue due to the contradictory permselectivity for separating the two emulsions. In the present investigation, the amphiphilicity-derived regional wetting mechanism of water and oil on the amphiphilic collagen fibers was revealed based on the combination of numerous experiments and molecular dynamics (MD) simulations. Electrostatic interactions and van der Waals force were manifested to be the driving forces of regional wetting in the hydrophilic and hydrophobic regions, respectively. The regional wetting endowed amphiphilic collagen fibers with underwater oleophobicity and underoil hydrophilicity, which enabled dual separation of emulsions by selectively retaining the dispersed water phase of W/O emulsions in the hydrophilic regions while the dispersed oil phase of O/W emulsions in the hydrophobic regions. The achieved separation efficiency was higher than 99.98%, and the flux reached 3337.6 L m-2 h-1. Initial wetting status significantly affects the regional wetting-enabled dual separation. Based on the MD simulations, amphiphilic intramolecular conformations of tropocollagen were suggested to be the origins of regional wetting on collagen fibers. Our findings may pave the way for developing high-performance dual separation materials that are promising to be utilized for the practical treatment of emulsion wastewater.
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Affiliation(s)
- Guangyan Chen
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Baicun Hao
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Yujia Wang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Yanan Wang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Hanzhong Xiao
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Huifang Li
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Xin Huang
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
| | - Bi Shi
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, P. R. China
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Abstract
Suspensions of chemically powered self-propelled colloidal particles are examples of active matter systems with interesting properties. While simple spherical Janus particles are often studied, it is known that geometry is important and recent experiments have shown that chemically active torus-shaped colloids behave differently from spherical colloids. In this paper, coarse-grained microscopic simulations of the dynamics of self-diffusiophoretic torus colloids are carried out in bulk solution in order to study how torus geometric factors influence their active motion. The concentration and velocity fields are key ingredients in self-diffusiophoretic propulsion, and the forms that these fields take in the colloid vicinity are shown to be strong functions of torus geometric parameters such as the torus hole size and thickness of the torus tube. This work utilizes a method where self-diffusiophoretic torus colloids with various geometric and dynamical characteristics can be built and studied in fluid media that include chemical reactions and fluid flows. The model can be used to investigate the collective properties of these colloids and their dynamics in confined systems, topics that are of general importance for applications that use colloidal motors with complex geometries.
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Affiliation(s)
- Jiyuan Wang
- School of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Harbin 150022, People's Republic of China
| | - Mu-Jie Huang
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Raymond Kapral
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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12
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Fan X, Hao Q, Li M, Zhang X, Yang X, Mei Y, Qiu T. Hotspots on the Move: Active Molecular Enrichment by Hierarchically Structured Micromotors for Ultrasensitive SERS Sensing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:28783-28791. [PMID: 32469196 DOI: 10.1021/acsami.0c05371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is recognized as one of the most sensitive spectroscopic tools for chemical and biological detections. Hotspots engineering has expedited promotion of SERS performance over the past few decades. Recently, molecular enrichment has proven to be another effective approach to improve the SERS performance. In this work, we propose a concept of "motile hotspots" to realize ultrasensitive SERS sensing by combining hotspots engineering and active molecular enrichment. High-density plasmonic nanostructure-supporting hotspots are assembled on the tubular outer wall of micromotors via nanoimprint and rolling origami techniques. The dense hotspots carried on these hierarchically structured micromotors (HSMs) can be magnet-powered to actively enrich molecules in fluid. The active enrichment manner of HSMs is revealed to be effective in accelerating the process of molecular adsorption. Consequently, SERS intensity increases significantly because of more molecules being adjacent to the hotspots after active molecular enrichment. This "motile hotspots" concept provides a synergistical approach in constructing a SERS platform with high performance. Moreover, the newly developed construction method of HSMs manifests the possibility of tailoring tubular length and diameter as well as surface patterns on the outer wall of HSMs, demonstrating good flexibility in constructing customized micromotors for various applications.
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Affiliation(s)
- Xingce Fan
- School of Physics, Southeast University, Nanjing 211189, China
| | - Qi Hao
- School of Physics, Southeast University, Nanjing 211189, China
| | - Mingze Li
- School of Physics, Southeast University, Nanjing 211189, China
| | - Xinyuan Zhang
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - Xiaozhi Yang
- School of Physics, Southeast University, Nanjing 211189, China
| | - Yongfeng Mei
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - Teng Qiu
- School of Physics, Southeast University, Nanjing 211189, China
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