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Jiang S, Zhang Y, Ma H, Zha X, Peng X, Li J, Lu C. Effects of Cavity Thickness on the Replication of Micro Injection Molded Parts with Microstructure Array. Polymers (Basel) 2022; 14:polym14245471. [PMID: 36559838 PMCID: PMC9786217 DOI: 10.3390/polym14245471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022] Open
Abstract
Parts with microstructure arrays have been widely used in biotechnologies and optical technologies, and their performances are affected by replication uniformity. The uniformity of the microstructure is still a challenge in micro-injection molded parts and is greatly affected by the cavity thickness and process parameters. In this study, the replication uniformity of microstructures is experimentally investigated. The relationship between the replication uniformity and cavity thickness was explored through single-factor experiments. Additionally, the impacts of the process parameters on the replication uniformity were also studied through uniform design experiments. A regression equation was established to describe the quantitative relationship between the important parameters and replication uniformity. The results showed that the replication uniformity of microstructures increases by 39.82% between the cavity with the thickness of 0.5 mm and a cavity of 0.7 mm. In addition, holding time is the most significant factor influencing the replication uniformity, followed by mold temperature, melt temperature, and injection speed. It is concluded that the thickness of cavity and the process parameters have significant influence on the replication uniformity. The experimental results provide important data on how to improve the replication uniformity of parts with microstructure arrays.
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Affiliation(s)
- Shaofei Jiang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yuansong Zhang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Haowei Ma
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaoqiang Zha
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiang Peng
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiquan Li
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Taizhou Key Laboratory of Advanced Manufacturing Technology, Taizhou 318014, China
- Correspondence: (J.L.); (C.L.)
| | - Chunfu Lu
- Industrial Design and Research Institute, Zhejiang University of Technology, Hangzhou 310014, China
- Correspondence: (J.L.); (C.L.)
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2
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Debnath T, Hattori R, Okamoto S, Shibata T, Santra TS, Nagai M. Automated detection of patterned single-cells within hydrogel using deep learning. Sci Rep 2022; 12:18343. [PMID: 36316380 PMCID: PMC9622733 DOI: 10.1038/s41598-022-22774-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/19/2022] [Indexed: 11/20/2022] Open
Abstract
Single-cell analysis has been widely used in various biomedical engineering applications, ranging from cancer diagnostics, and immune response monitoring to drug screening. Single-cell isolation is fundamental for observing single-cell activities and an automatic finding method of accurate and reliable cell detection with few possible human errors is also essential. This paper reports trapping single cells into photo patternable hydrogel microwell arrays and isolating them. Additionally, we present an object detection-based DL algorithm that detects single cells in microwell arrays and predicts the presence of cells in resource-limited environments at the highest possible mAP (mean average precision) of 0.989 with an average inference time of 0.06 s. This algorithm leads to the enhancement of the high-throughput single-cell analysis, establishing high detection precision and reduced experimentation time.
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Affiliation(s)
- Tanmay Debnath
- grid.412804.b0000 0001 0945 2394Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan
| | - Ren Hattori
- grid.412804.b0000 0001 0945 2394Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan
| | - Shunya Okamoto
- grid.412804.b0000 0001 0945 2394Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan
| | - Takayuki Shibata
- grid.412804.b0000 0001 0945 2394Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan
| | - Tuhin Subhra Santra
- grid.417969.40000 0001 2315 1926Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036 India
| | - Moeto Nagai
- grid.412804.b0000 0001 0945 2394Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan ,grid.412804.b0000 0001 0945 2394Electronic Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi, Aichi 441-8580 Japan
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3
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Zhao X, Zhao W, Zhang Y, Zhang X, Ma Z, Wang R, Wei Q, Ma S, Zhou F. Recent progress of bioinspired cartilage hydrogel lubrication materials. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Xiaoduo Zhao
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai China
| | - Weiyi Zhao
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
| | - Yunlei Zhang
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
| | - Xiaoqing Zhang
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
| | - Zhengfeng Ma
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Baiyin Zhongke Innovation Research Institute of Green Materials Baiyin China
| | - Rui Wang
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
| | - Qiangbing Wei
- College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou China
| | - Shuanhong Ma
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
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Biofabrication of aligned structures that guide cell orientation and applications in tissue engineering. Biodes Manuf 2021. [DOI: 10.1007/s42242-020-00104-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Fu Y, Soldera M, Wang W, Milles S, Deng K, Voisiat B, Nielsch K, Lasagni AF. Wettability control of polymeric microstructures replicated from laser-patterned stamps. Sci Rep 2020; 10:22428. [PMID: 33380738 PMCID: PMC7773741 DOI: 10.1038/s41598-020-79936-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 12/15/2020] [Indexed: 11/18/2022] Open
Abstract
In this study, two-step approaches to fabricate periodic microstructures on polyethylene terephthalate (PET) and poly(methyl methacrylate) (PMMA) substrates are presented to control the wettability of polymeric surfaces. Micropillar arrays with periods between 1.6 and 4.6 µm are patterned by plate-to-plate hot embossing using chromium stamps structured by four-beam Direct Laser Interference Patterning (DLIP). By varying the laser parameters, the shape, spatial period, and structure height of the laser-induced topography on Cr stamps are controlled. After that, the wettability properties, namely the static, advancing/receding contact angles (CAs), and contact angle hysteresis were characterized on the patterned PET and PMMA surfaces. The results indicate that the micropillar arrays induced a hydrophobic state in both polymers with CAs up to 140° in the case of PET, without modifying the surface chemistry. However, the structured surfaces show high adhesion to water, as the droplets stick to the surfaces and do not roll down even upon turning the substrates upside down. To investigate the wetting state on the structured polymers, theoretical CAs predicted by Wenzel and Cassie-Baxter models for selected structured samples with different topographical characteristics are also calculated and compared with the experimental data.
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Affiliation(s)
- Yangxi Fu
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany
| | - Marcos Soldera
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany. .,PROBIEN-CONICET, Dto.de Electrotecnia, Universidad Nacional del Comahue, Buenos Aires 1400, 8300, Neuquén, Argentina.
| | - Wei Wang
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany
| | - Stephan Milles
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany
| | - Kangfa Deng
- Institute for Metallic Materials, IFW Dresden, Helmholtzstr. 20, 01069, Dresden, Germany
| | - Bogdan Voisiat
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany
| | - Kornelius Nielsch
- Institute for Metallic Materials, IFW Dresden, Helmholtzstr. 20, 01069, Dresden, Germany.,Institut Für Angewandte Physik, Technische Universität Dresden, Nöthnitzer Str. 61, 01187, Dresden, Germany.,Institut Für Werkstoffwissenschaft, Technische Universität Dresden, Helmholtzstr. 7, 01069, Dresden, Germany
| | - Andrés Fabián Lasagni
- Institut Für Fertigungstechnik, Technische Universität Dresden, George-Bähr-Str. 3c, 01069, Dresden, Germany.,Fraunhofer-Institut Für Werkstoff- und Strahltechnik IWS, Winterbergstr. 28, 01277, Dresden, Germany
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Wang X, Sperling M, Reifarth M, Böker A. Shaping Metallic Nanolattices: Design by Microcontact Printing from Wrinkled Stamps. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1906721. [PMID: 32091182 DOI: 10.1002/smll.201906721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/24/2020] [Indexed: 05/13/2023]
Abstract
A method for the fabrication of well-defined metallic nanostructures is presented here in a simple and straightforward fashion. As an alternative to lithographic techniques, this routine employs microcontact printing utilizing wrinkled stamps, which are prepared from polydimethylsiloxane (PDMS), and includes the formation of hydrophobic stripe patterns on a substrate via the transfer of oligomeric PDMS. Subsequent backfilling of the interspaces between these stripes with a hydroxyl-functional poly(2-vinyl pyridine) then provides the basic pattern for the deposition of citrate-stabilized gold nanoparticles promoted by electrostatic interaction. The resulting metallic nanostripes can be further customized by peeling off particles in a second microcontact printing step, which employs poly(ethylene imine) surface-decorated wrinkled stamps, to form nanolattices. Due to the independent adjustability of the period dimensions of the wrinkled stamps and stamp orientation with respect to the substrate, particle arrays on the (sub)micro-scale with various kinds of geometries are accessible in a straightforward fashion. This work provides an alternative, cost-effective, and scalable surface-patterning technique to fabricate nanolattice structures applicable to multiple types of functional nanoparticles. Being a top-down method, this process could be readily implemented into, e.g., the fabrication of optical and sensing devices on a large scale.
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Affiliation(s)
- Xuepu Wang
- Fraunhofer Institute for Applied Polymer Research IAP, D-14476, Potsdam-Golm, Germany
- Chair of Polymer Materials and Polymer Technologies, University of Potsdam, D-14476, Potsdam-Golm, Germany
| | - Marcel Sperling
- Fraunhofer Institute for Applied Polymer Research IAP, D-14476, Potsdam-Golm, Germany
| | - Martin Reifarth
- Fraunhofer Institute for Applied Polymer Research IAP, D-14476, Potsdam-Golm, Germany
| | - Alexander Böker
- Fraunhofer Institute for Applied Polymer Research IAP, D-14476, Potsdam-Golm, Germany
- Chair of Polymer Materials and Polymer Technologies, University of Potsdam, D-14476, Potsdam-Golm, Germany
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Hu X, Dinu CZ. A bio-pen for direct writing of single molecules on user-functionalized surfaces. NANOSCALE ADVANCES 2020; 2:156-165. [PMID: 36133986 PMCID: PMC9417116 DOI: 10.1039/c9na00379g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 10/30/2019] [Indexed: 06/16/2023]
Abstract
Advancing ultrahigh resolution (below 10 nm) direct writing technologies could lead to impacts in areas as diverse as disease detection, genetic analysis and nanomanufacturing. Current methods based on electron-beams and photo- or dip-pen nanolithography are laborious and lack flexibility when aiming to create single molecule patterns for application specific integration. We hypothesize that a novel strategy could be developed to allow for writing of parallel and yet individually addressable patterns of single molecules on user-controlled surfaces. The strategy is based on using in vitro self-recognition of tubulin protein to assemble rigid protofilaments of microtubules, with one such microtubule to be subsequently used as a "bio-pen" capable of writing "inks" of single kinesin molecules in user-defined environments. Our results show that single kinesin inks could be written under the energy of adenosine triphosphate hydrolysis and observed by both atomic force and optical microscopy. Upon extending ink functionalities, the integration of soft and hard materials for nanostructure assembly and complex single molecule pattern formation is envisioned.
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Affiliation(s)
- Xiao Hu
- Department of Chemical and Biomedical Engineering, West Virginia University, Benjamin M. Statler College of Engineering and Mineral Resources PO Box 6102 Morgantown WV 26506 USA +1 304 293 4139 +1 304 293 9338
| | - Cerasela Zoica Dinu
- Department of Chemical and Biomedical Engineering, West Virginia University, Benjamin M. Statler College of Engineering and Mineral Resources PO Box 6102 Morgantown WV 26506 USA +1 304 293 4139 +1 304 293 9338
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Tsuyukubo A, Sumaru K, Kanamori T. Photolithographic Fabrication of Semi 3-D Microstructures Composed of Flexible Hydrogel Sheet for in Vivo-like Cell Culture System. ACS APPLIED BIO MATERIALS 2019; 2:4129-4133. [DOI: 10.1021/acsabm.9b00656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Atsushi Tsuyukubo
- Biotechnology Research Institute for Drug Discovery (BRD), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central fifth, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- School of Integrative and Global Majors, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Kimio Sumaru
- Biotechnology Research Institute for Drug Discovery (BRD), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central fifth, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Toshiyuki Kanamori
- Biotechnology Research Institute for Drug Discovery (BRD), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central fifth, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- School of Integrative and Global Majors, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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9
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Gantumur E, Kimura M, Taya M, Horie M, Nakamura M, Sakai S. Inkjet micropatterning through horseradish peroxidase-mediated hydrogelation for controlled cell immobilization and microtissue fabrication. Biofabrication 2019; 12:011001. [PMID: 31412324 DOI: 10.1088/1758-5090/ab3b3c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A simple fabrication method for cell micropatterns on hydrogel substrates was developed using an inkjet printing system that induced hydrogel micropatterns. The hydrogel micropatterns were created from inks resulting in cell-adhesive and non-cell-adhesive printed regions by horseradish peroxidase-catalyzed reaction onto non-cell-adhesive and cell-adhesive hydrogel substrates, respectively, to obtain the cell micropatterns. Cell-adhesive and non-cell-adhesive regions were obtained from gelatin and alginate derivatives, respectively. The cells on the cell-adhesive regions were successfully aligned, resulting in recognizable patterns. Furthermore, the proposed system permits the patterning of multiple cell types by switching the non-cell-adhesive region to the cell-adhesive region in the presence of growing cells. Also, we could fabricate disc- and filament-shaped small tissues by degrading the non-cell-adhesive substrates having dot- and line-shaped cell-adhesive micropatterns using alginate-lyase. These results indicate that our system is useful for fabrication of tailor-made cell patterns and microtissues with the shape defined by the micropattern, and will be conducive to a diverse range of biological applications.
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Affiliation(s)
- Enkhtuul Gantumur
- Department of Materials Science and Engineering, Graduate School of Engineering Science, Osaka University, Osaka, 560-8531, Japan
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