Detection of organophosphorus compounds using a molecularly imprinted photonic crystal

Responsive photonic crystal for the sensing of environmental pollutants

“…They also introduced hafnium oxide instead of zirconia to response to paraoxon [37], and the paraoxon concentration correlated to peak shift presented linearly, which is promising in quantitative analysis. Furthermore, Liu et al [38] designed a new kind of molecularly imprinted photonic hydrogel which specifically recognized the methyl phosphonic acid (MPA), the degradation product of nerve agents, to fill the voids of CCA. The obtained inverse opal structure had interconnected macro porous cavities ($250 nm) inside the matrix.…”

Molecularly Imprinted Polymers as Tools for Bioassays and Biotransformation

“…Liu et al [32] developed a molecularly imprinted photonic crystal (MIPC) to detect the degradation product of nerve agents. Mono-dispersed poly-methyl methacrylate colloidal particles with the diameter of 280 nm were used to fabricate a closely packed colloidal crystal array (CCA), and a methyl phosphonic acid (MPA) imprinted hydrogel was prepared within the CCA.…”

Molecular imprinted opal closest-packing photonic crystals for the detection of trace 17β-estradiol in aqueous solution

“…Molecular imprinting is a well-established and facile technique used to prepare molecularly imprinted polymers (MIPs) with artificially specific molecular recognition ability. There were some reports on the introduction of MIPs into IO PC for measuring various chemical and environmental stimuli, such as atrazine, protein and stimulants [17,18]. However, formation of high-quality IO PC with an inverse opal structure over a large area usually takes hours, days, or even months to finalize, and the wet etching of the crystal template may also destroy the hydrogel matrix.…”

“…However, a novel self-reporting sensor platform using the opal closest-packing (OCP) photonic crystal (PC) would be an interesting alternative for easy and rapid detection of the pollutant [11]. The OCP PC is a class of three-dimensional (3D) PC with the continuously ordered 111 plane of the face centered cubic (FCC) lattices and periodic structure, which is different from non-closest-packing polymerized colloidal crystal arrays (PCCA) consisted of highly charged monodisperse polymer spheres [12,13,14], and inverse opal PC (IO PC) composed of a periodically ordered interconnecting porosity-endowed hydrogels [15,16,17,18]. Owing to the Bragg diffraction effect, such PC also exhibits the fascinating Bragg diffraction and bright structural color.…”