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Rational Assembly of Superstructure Microparticles into Mosaic‐Like Highly Oriented Monolayer for Glucose‐Responsive Electrodes
Author(s) -
Cai Yun,
Shi Yue,
Yazicioglu Deniz,
Yu Fengjiao,
Gutsch Sebastian,
Zacharias Margit,
Yang Yang
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202100433
Subject(s) - monolayer , materials science , superstructure , tin oxide , electrode , doping , crystallization , electrochemistry , self assembly , nanotechnology , electrolyte , chemical engineering , optoelectronics , chemistry , oceanography , engineering , geology
Assembly of functional superstructure microparticles into large‐scale transferable ensembles is a practical approach to elaborate collective properties for catalytic and sensing applications. Here, a two‐step assembly process is proposed to fabricate a mosaic‐like highly oriented monolayer consisting of densely packed CuI superstructure microparticles (s‐CuI) over a large area. First, optimized synthesis and Cl doping of rectangular sheet‐like s‐CuI is achieved by antisolvent crystallization. Then, a steep capillary gradient is created along the water surface to compress the pre‐dispersed s‐CuI into a centimeter‐sized mosaic‐like highly oriented monolayer, which can be integrally transferred onto fluorine‐doped tin oxide glass substrates. The s‐CuI monolayer with optimal Cl doping exhibits a highly sensitive electrochemical response to glucose in a nonenzymatic weakly alkaline environment. A photoelectrochemical response to glucose can also be achieved in nonenzymatic neutral solution. The high performances are ascribed to large surface area, excellent electrical contact, and consistently exposed Cu + active sites of the s‐CuI building blocks.