Fabrication of PAM/PMAA inverse opal photonic crystal hydrogels by a “sandwich” method and their pH and solvent responses

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 85885-85890 ◽  
Author(s):  
Dongjian Shi ◽  
Xiaodong Zhang ◽  
Zhaokun Yang ◽  
Shirong Liu ◽  
Mingqing Chen
Keyword(s):  
Photonic Crystal ◽  
High Sensitivity ◽  
Inverse Opal ◽  
Ordered Structures ◽  
Sandwich Method ◽  
External Stimuli ◽  
Tunable Property

A “Sandwich” method was used to prepare PAM and PAM/PMAA IOHs with 3D ordered structures and optically tunable property. Both kinds of IOHs responded quickly and with high-sensitivity to various external stimuli such as pH, methanol and ethanol.

Fluoral-p infiltrated SiO2 inverse opal photonic crystals as fluorescent film sensors for detecting formaldehyde vapor

2016 ◽  
Vol 4 (41) ◽  
pp. 9841-9847 ◽  
Author(s):  
Yuqi Zhang ◽  
Lidan Mu ◽  
Ru Zhou ◽  
Pei Li ◽  
Jiaqi Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Inverse Opal ◽  
Quick Response ◽  
Crystal Film ◽  
Formaldehyde Vapor ◽  
Excellent Selectivity

A Fluoral-p infiltrated SiO2 inverse opal photonic crystal film can be employed as a fluorescent sensor with a quick response, high sensitivity, excellent selectivity and convenient recyclability for the detection of formaldehyde.

scholarly journals Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid infrared

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali Rostamian ◽  
Ehsan Madadi-Kandjani ◽  
Hamed Dalir ◽  
Volker J. Sorger ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
Guided Wave ◽  
Silicon On Insulator ◽  
Group Index ◽  
Photonic Crystal Waveguide ◽  
Mid Infrared ◽  
Lab On Chip ◽  
On Chip

Abstract Thanks to the unique molecular fingerprints in the mid-infrared spectral region, absorption spectroscopy in this regime has attracted widespread attention in recent years. Contrary to commercially available infrared spectrometers, which are limited by being bulky and cost-intensive, laboratory-on-chip infrared spectrometers can offer sensor advancements including raw sensing performance in addition to use such as enhanced portability. Several platforms have been proposed in the past for on-chip ethanol detection. However, selective sensing with high sensitivity at room temperature has remained a challenge. Here, we experimentally demonstrate an on-chip ethyl alcohol sensor based on a holey photonic crystal waveguide on silicon on insulator-based photonics sensing platform offering an enhanced photoabsorption thus improving sensitivity. This is achieved by designing and engineering an optical slow-light mode with a high group-index of n g  = 73 and a strong localization of modal power in analyte, enabled by the photonic crystal waveguide structure. This approach includes a codesign paradigm that uniquely features an increased effective path length traversed by the guided wave through the to-be-sensed gas analyte. This PIC-based lab-on-chip sensor is exemplary, spectrally designed to operate at the center wavelength of 3.4 μm to match the peak absorbance for ethanol. However, the slow-light enhancement concept is universal offering to cover a wide design-window and spectral ranges towards sensing a plurality of gas species. Using the holey photonic crystal waveguide, we demonstrate the capability of achieving parts per billion levels of gas detection precision. High sensitivity combined with tailorable spectral range along with a compact form-factor enables a new class of portable photonic sensor platforms when combined with integrated with quantum cascade laser and detectors.

Rapid, highly sensitive and quantitative detection of interleukin 6 based on SERS magnetic immunoassay

2021 ◽  
Vol 13 (15) ◽  
pp. 1823-1831
Author(s):  
Xiaomei Wang ◽  
Li Ma ◽  
Shijiao Sun ◽  
Tingwei Liu ◽  
Hao Zhou ◽  
...  
Keyword(s):  
Interleukin 6 ◽  
High Sensitivity ◽  
Quantitative Detection ◽  
Detection Time ◽  
Highly Sensitive ◽  
Sandwich Method

We have developed a SERS magnetic immunoassay method based on the principle of sandwich method for rapid and quantitative detection of IL-6. The developed SERS method has the advantages of high sensitivity and detection time is only 15 min.

Visual detection of carbonate ions by inverse opal photonic crystal polymers in aqueous solution

2015 ◽  
Vol 3 (37) ◽  
pp. 9524-9527 ◽  
Author(s):  
Lu Li ◽  
Bin Zhao ◽  
Yue Long ◽  
Jin-Ming Gao ◽  
Guoqiang Yang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photonic Crystal ◽  
Polymer Films ◽  
Visual Detection ◽  
Color Change ◽  
Ph Dependence ◽  
Inverse Opal ◽  
Carbonate Ions ◽  
Crystal Polymer

This communication demonstrates a facile method to detect CO32− by naked eyes through color change based on the pH dependence of inverse opal photonic crystal polymer films.

High sensitivity and high Q-factor nanoslotted parallel quadrabeam photonic crystal cavity for real-time and label-free sensing

2014 ◽  
Vol 105 (6) ◽  
pp. 063118 ◽  
Author(s):  
Daquan Yang ◽  
Shota Kita ◽  
Feng Liang ◽  
Cheng Wang ◽  
Huiping Tian ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Real Time ◽  
High Sensitivity ◽  
Q Factor ◽  
Label Free ◽  
Photonic Crystal Cavity ◽  
High Q

Chemically Responsive Polymer Inverse-Opal Photonic Crystal Films Created by a Self-Assembly Method

2016 ◽  
Vol 120 (22) ◽  
pp. 11938-11946 ◽  
Author(s):  
Huilin Zhao ◽  
Jianping Gao ◽  
Zeng Pan ◽  
Guanbo Huang ◽  
Xiaoyang Xu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Self Assembly ◽  
Inverse Opal ◽  
Assembly Method ◽  
Responsive Polymer ◽  
Crystal Films

An ordered fish scale-like Co-TiO2/GO inverse opal photonic crystal as the multifunctional SERS substrate

2021 ◽  
Vol 858 ◽  
pp. 158356
Author(s):  
Zhou Zhao ◽  
Huan He ◽  
Yaping Zhu ◽  
Xueyan Wang ◽  
Yuhua Shen ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Sers Substrate ◽  
Fish Scale ◽  
Inverse Opal
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