Wang Zhe, Xue Min, Zhang Herong, Meng Zihui, Shea Kenneth J, Qiu Lili, Ji Tiantian, Xie Tengsheng
School of Chemistry & Chemical Engineering, Beijing Institute of Technology Beijing 102488 China
Department of Chemistry, University of California Irvine California 92697 USA.
RSC Adv. 2018 Mar 12;8(18):9963-9969. doi: 10.1039/c7ra12661a. eCollection 2018 Mar 5.
Traditional artificial opals are assembled from silica or polystylene colloidals which have poor swellability and a lower response to stimuli. A novel three-dimensional photonic crystal array sensor which has a high stability and desired structural colour was fabricated from the self assembly of nano hydrogel colloids. The nano hydrogel colloids were prepared by co-polymerisation of -isopropylacrylamide, functional monomer acrylic acid and -butylacrylamide. The relative humidity from 20% to 100% could be detected rapidly the reflection spectrum of the nano hydrogel colloidal array with a maximum amount of red shift of 24 nm. The response kinetics for humidity of the nano hydrogel colloidal array were investigated, and correspondingly, a rational response mechanism of the compactness of the close-packed structure caused by the swelling of the nano hydrogel colloidal array was discussed. The nano hydrogel colloidal array sensor presented good reversibility and can be reused for at least five rounds.
传统的人工蛋白石是由二氧化硅或聚苯乙烯胶体组装而成，它们的溶胀性较差，对刺激的响应较低。通过纳米水凝胶胶体的自组装制备了一种具有高稳定性和所需结构颜色的新型三维光子晶体阵列传感器。纳米水凝胶胶体是通过异丙基丙烯酰胺、功能单体丙烯酸和丁基丙烯酰胺的共聚制备的。纳米水凝胶胶体阵列的反射光谱最大红移量为24nm，可快速检测20%至100%的相对湿度。研究了纳米水凝胶胶体阵列对湿度的响应动力学，并相应地讨论了纳米水凝胶胶体阵列溶胀导致密排结构致密性的合理响应机制。纳米水凝胶胶体阵列传感器具有良好的可逆性，可重复使用至少五轮。
