作者
Rachele Castaldo, Giuseppe Cesare Lama, Paolo Aprea, Gennaro Gentile, Veronica Ambrogi, Marino Lavorgna, Pierfrancesco Cerruti
发表日期
2019/4
期刊
Advanced Functional Materials
卷号
29
期号
14
页码范围
1807744
简介
Humidity‐driven and electrically responsive graphene/cloisite hybrid films are obtained by casting water dispersions of graphene oxide and cloisite Na+. Coupling hydrophilicity and a high water vapor barrier in a homogenous film enables to realize humidity‐driven actuators which exploit the water gradient generated across the film section under asymmetric exposure to humidity. The hybrid films are self‐standing, flexible, and exhibit fast humidity‐triggered bidirectional bending up to 75°, which is tuned by varying the relative amount of the two components. Up to 60% of the bending angle can be preserved at the steady state, providing a large and reliable response to humidity. Moreover, thermal treatment results in the reduction of graphene oxide, endowing the films with humidity‐dependent electrical conductivity, which increases from 1.5 × 10−6 S at 20% relative humidity (RH) up to 2.7 × 10−5 S at 90% RH. The …
引用总数
201920202021202220232024291411217
学术搜索中的文章
R Castaldo, GC Lama, P Aprea, G Gentile, V Ambrogi… - Advanced Functional Materials, 2019