Optical Sensors Based on Optical Interference of Nanoporous Film

Wang, Ya-Feng; Yang, Qian; Su, Bin

doi:10.6023/a17070300

Cited by 2 publications

(3 citation statements)

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“…间距进一步增大, 与可见光波长在同一数量级时, 可得到长程有序､具有结构色的 "光子液晶" (photonic liquid crystals, photonic LCs)材料 [3,4] . 基于分散体系的光子液晶具有良好的流动性, 在外界刺激条件下可实现快速响应, 因此在彩色显示､传感器和生物检测等方面具有潜在应用价值 [3][4][5][6] .…”

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Dispersions of α-Zirconium Phosphate/organic Solvent with Structural Colors

Zhang¹,

Zhang²,

Liu³

2020

Acta Chim. Sinica

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Dispersions of α-Zirconium Phosphate/organic Solvent with Structural Colors

Zhang¹,

Zhang²,

Liu³

2020

Acta Chim. Sinica

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“…Among these, RIfS, which is label-free, fast, and cost-effective, has attracted more and more attention. 34,35 RIfS is based on the optical interference of light reflected from the interfaces of adjacent layers with different refractive indices. Single-layer or multilayer membranes are usually used in RIfS.…”

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“…Vapochromism, − surface plasmon resonance (SPR), chemiresistors, − electrochemistry, and reflectometric interference spectroscopy (RIfS) − have been developed in laboratories for VOC detection. Among these, RIfS, which is label-free, fast, and cost-effective, has attracted more and more attention. , RIfS is based on the optical interference of light reflected from the interfaces of adjacent layers with different refractive indices. Single-layer or multilayer membranes are usually used in RIfS.…”

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confidence: 99%

Silica-Nanochannel-Based Interferometric Sensor for Selective Detection of Polar and Aromatic Volatile Organic Compounds

et al. 2018

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Public awareness of the toxicity of volatile organic compounds (VOCs) has led to increased requirements for direct measurement of these substances. This work reports the sensitive detection of VOCs at the ppb level by an interferometric sensor based on the multilayer silica-nanochannel membrane (MSNM). The MSNM is fabricated by layer-by-layer stacking of a free-standing ultrathin SNM composed of regularly ordered channels with an ultrasmall diameter of about 2.3 nm and an ultrahigh density of about 4 × 10 cm. Light reflected from parallel interfaces of the MSNM gives rise to the interferometric pattern with constructive and destructive fringes. The adsorption of VOCs to a highly porous MSNM varies the refractive index of the MSNM, resulting in the shift of the reflectometric interference spectrum (RIS) and thus yielding highly sensitive responses with a limit of detection (LOD) at the ppb level. Moreover, the sensor selectively responds to polar ethanol and acetone, as well as aromatic benzene, toluene, and chlorobenzene, but is insensitive to nonpolar ethane or hexane. The selectivity most likely arises from hydrogen bonding and dipole interaction of VOCs with silica surface.

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Optical Sensors Based on Optical Interference of Nanoporous Film

Cited by 2 publications

References 0 publications

Dispersions of α-Zirconium Phosphate/organic Solvent with Structural Colors

Dispersions of α-Zirconium Phosphate/organic Solvent with Structural Colors

Silica-Nanochannel-Based Interferometric Sensor for Selective Detection of Polar and Aromatic Volatile Organic Compounds

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