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Sorting Gold and Sand(Silica) Using atomic force microscope-based Dielectrophoresis

Nano-Micro Letters 2022年第2期14卷 1-11页

作者： Chungman Kim Sunghoon Hong Dongha Shin Sangmin An Xingcai Zhang Wonho Jhe Department of Physics and Astronomy Seoul National UniversitySeoul 08826Republic of Korea John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138United States Department of Chemistry and Chemical Engineering Inha UniversityIncheon 22212Republic of Korea Department of Physics Institute of Photonics and Information TechnologyJeonbuk National UniversityJeonju 54896Korea School of Engineering Massachusetts Institute of TechnologyCambridgeMA 02139United States

Additive manufacturing-also known as 3D printing-has attracted much attention in recent years as a powerful method for the simple and versatile fabrication of complicated three-dimensional ***,the current technology still exhibits a limitation in realizing the selective deposition and sorting of various materials contained in the same reservoir,which can contribute significantly to additive printing or manufacturing by enabling simultaneous sorting and deposition of different substances through a single ***,we propose a dielectrophoresis(DEP)-based material-selective deposition and sorting technique using a pipette-based quartz tuning fork(QTF)-atomic force microscope(AFM) platform DEPQA and demonstrate multi-material sorting through a single nozzle in ambient *** used Au and silica nanoparticles for sorting and obtained 95% accuracy for spatial separation,which confirmed the surfaceenhanced Raman spectroscopy(SERS).To validate the scheme,we also performed a simulation for the system and found qualitative agreement with the experimental *** method that combines DEP,pipette-based AFM,and SERS may widely expand the unique capabilities of 3D printing and nano-micro patterning for multi-material patterning,materials sorting,and diverse advanced applications.

关键词： Dielectrophoresis-empowered Pipette/AFM platform On-demand materials sorting Additive 3D printing Multimaterial nano-patterning nanopipette-based atomic force microscope

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