H2O-and ethanol concentration-responsive polymer/gel inverse opal photonic crystal

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:605

Article

Xia Hongbo¹  Li Dan¹  Wu Suli²  Feng Shuai³  Meng Chao³  Dong Bin¹ 

[1] Dalian Minzu Univ, Sch Phys & Mat Engn, Key Lab Photosensit Mat & Devices Liaoning Prov, Key Lab New Energy & Rare Earth Resource Utilizat, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[3] Minzu Univ China, Sch Sci, Beijing 100081, Peoples R China

关键词: Photonic crystal;    Structural color;    Capillary action;    Hydrogen bonding;   

DOI  :  10.1016/j.jcis.2021.07.112

来源: Elsevier

【 摘 要 】

Responsive photonic crystals have attracted much attention due to their strong capability to manipulate the propagation of light in the visible region, but it is still a big challenge to invisibility and mechanical stability. Here, the novel Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals, which have high mechanical stability and can release visible patterns after wetting with water, are discussed. The Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals are also responsive to the concentration of ethanol, and the structural color response times increase with increasing ethanol concentration. This design uses the selective infiltration, hydrogen bonding and capillary action of solvent to realize the spectral diversity of reflectance. Owing to the high polarity and hydrogen bonding ability of carboxyl groups, water molecules are adsorbed easily by the poly(acrylic acid) gel. Subsequently, the encrypted information is decrypted due to the redshift of the structural color. Because of its lower polarity and hydrogen bonding ability relative to water, ethanol can impede the absorption of solvent by gel. Therefore, the ethanol concentration can be identified based on the structural color response time. Furthermore, reliable information decryption methods make Poly(ether sulfone)/Poly(acrylic acid) inverse opal photonic crystals potentially uesful as trusted encryption devices. (c) 2021 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

【 授权许可】

Free