A hydrogel pen for electrochemical reaction and its applications for 3D printing

被引:32
|
作者
Kang, Hosuk [1 ]
Hwang, Seongpil [2 ]
Kwak, Juhyoun [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea
[2] Korea Univ, Dept Adv Mat Chem, Sejong 339700, South Korea
基金
新加坡国家研究基金会;
关键词
MICROSCOPY; ADVANTAGES; DIFFUSION; SURFACES; FILMS;
D O I
10.1039/c4nr06041e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A hydrogel pen consisting of a microscopic pyramid containing an electrolyte offers a localized electroactive area on the nanometer scale via controlled contact of the apex with a working electrode. The hydrogel pen merges the fine control of atomic force microscopy with non-linear diffusion of an ultra-microelectrode, producing a faradaic current that depends on the small electroactive area. The theoretical and experimental investigations of the mass transport behavior within the hydrogel reveal that the steady-state current from the faradaic reaction is linearly proportional to the deformed length of the hydrogel pen by contact, i.e. signal transduction of deformation to an electrochemical signal, which enables the fine control of the electroactive area in the nanometer-scale regime. Combined with electrodeposition, localized electrochemistry of the hydrogel pen results in the ability to fabricate small sizes (110 nm in diameter), tall heights (up to 30 mu m), and arbitrary structures, thereby indicating an additive process in 3 dimensions by localized electrodeposition.
引用
收藏
页码:994 / 1001
页数:8
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