Environmental Copper Sensor Based on Polyethylenimine-Functionalized Nanoporous Anodic Alumina Interferometers

Abstract

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Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

“…To provide overview of many functionalities discussed in Sections 4.1-4.7, they are gathered in the Table 2. [190] Gradient-index filters [191] Distributed Bragg reflectors [192] Optical bandpass filters [193] Human protein heavy ions real-time interaction monitoring [194] Tailoring of optical properties with pulse anodization [149] Design of phase shift defect in effective refractive index [195] Hybrid distributed DBRs and apodized GIF photonic structure [196] Characterization of thermotropic ferroelectric liquid crystals confined in the NAA [197][198][199] Glass transition of discotic liquid crystals in one-dimensional fluid [200] Adjustable optical anisotropy by self-assembly of liquid crystals confined in porous structure [201] Sensors NAA template-assisted fabrication of chromium substrate for SERS detection of heavy ions in aqueous solutions [202] Au NPs array on NAA for SERS detection of hemoglobin [203] Controlled fabrication of periodic plasmonic dimer arrays for SERS [204] Graphene-NAA composite for SERS sensing [205] Label-free optical sensor based on interferometric reflectance spectroscopy for TNF-α detection [206] NAA-based interferometer for copper sensing [207] In vivo nanotubes nanotoxicity study on murine model […”

Fabrication of Porous Anodic Alumina (PAA) by High-Temperature Pulse-Anodization: Tuning the Optical Characteristics of PAA-Based DBR in the NIR-MIR Region

“…Porosity ( P ), in turn, determines the RI of the respective layers: RI decreases as P increases. Photonic materials are very sensitive to a slight change of the refractive index of a medium, which was used to fabricate a broad range of optical sensors [ 15 , 16 , 17 , 18 ]. The application of PAA-based PCs was limited to the visible (VIS) part of the spectrum due to the absence of corresponding crystals operating in mid-infrared (MIR) region.…”

Advances in Optical Biosensors and Sensors Using Nanoporous Anodic Alumina

“…The low detection limit was calculated at 12 nM. The sensitivity of the proposed IRS-based sensor was higher than previous IRS-based sensors that have been used for heavy metal sensing [ 136 , 137 , 138 , 139 , 140 , 141 ]. It was also investigated the selectivity of the Pb 2+ ion sensor towards interfering ions, such as Zn 2+ , Cu 2+ , Ni 2+ , Bi 3+ , Sn 2+ , Co 2+ , and Hg 2+ , in the presence of SCN − ions as a masking agent and also as a biosensor for the determination of Pb 2+ ions in seawater.…”