A Highly Sensitive Mercury Ion Sensor Based on Solid-Liquid Contact Electrification

In this study, a highly sensitive and selective sodium ion sensor consisting of a dual-gate (DG) structured silicon nanowire (SiNW) field-effect transistor (FET) as the transducer and a sodium-selective membrane extended gate (EG) as the sensing unit was developed. The SiNW channel DG FET was fabricated through the dry etching of the silicon-on-insulator substrate by using electrospun polyvinylpyrrolidone nanofibers as a template for the SiNW pattern transfer. The selectivity and sensitivity of sodium to other ions were verified by constructing a sodium ion sensor, wherein the EG was electrically connected to the SiNW channel DG FET with a sodium-selective membrane. An extremely high sensitivity of 1464.66 mV/dec was obtained for a NaCl solution. The low sensitivities of the SiNW channel FET-based sodium ion sensor to CaCl2, KCl, and pH buffer solutions demonstrated its excellent selectivity. The reliability and stability of the sodium ion sensor were verified under non-ideal behaviors by analyzing the hysteresis and drift. Therefore, the SiNW channel DG FET-based sodium ion sensor, which comprises a sodium-selective membrane EG, can be applied to accurately detect sodium ions in the analyses of sweat or blood.

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Fluorescent conjugated polymers based on thiocarbonyl quinacridone for sensing mercury ion and bioimaging

Polymer Chemistry ◽

10.1039/c4py00014e ◽

2014 ◽

Vol 5 (10) ◽

pp. 3396-3403 ◽

Cited By ~ 32

Author(s):

Yi Qu ◽

Xinran Zhang ◽

Yongquan Wu ◽

Fuyou Li ◽

Jianli Hua

Keyword(s):

Conjugated Polymers ◽

Mercury Ion ◽

Highly Sensitive

Highly sensitive FRET-based thiocarbonyl quinacridone fluorescent conjugated polymers for the sensing and bioimaging of mercury ion have been developed.

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A Biphasic Mercury-Ion Sensor: Exploiting Microfluidics to Make Simple Anilines Competitive Ligands

Chemistry - A European Journal ◽

10.1002/chem.201502736 ◽

2015 ◽

Vol 21 (41) ◽

pp. 14297-14300 ◽

Cited By ~ 7

Author(s):

Martin Petzoldt ◽

Carsten Eschenbaum ◽

S. Thimon Schwaebel ◽

Kerstin Broedner ◽

Uli Lemmer ◽

...

Keyword(s):

Mercury Ion ◽

Ion Sensor

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Reflective Fiber Surface Plasmon Resonance Sensor for High-Sensitive Mercury Ion Detection

Applied Sciences ◽

10.3390/app9071480 ◽

2019 ◽

Vol 9 (7) ◽

pp. 1480 ◽

Cited By ~ 4

Author(s):

Zhenlin Chen ◽

Kunlin Han ◽

Ya-Nan Zhang

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Gold Film ◽

Mercury Ion ◽

Great Promise ◽

Water Safety ◽

Ion Sensor ◽

Sensitive Film ◽

Resonance Sensor

This paper proposes a reflective fiber mercury ion sensor based on the surface plasmon resonance (SPR) principle and chitosan (CS)/polyacrylic acid (PAA) multilayer sensitive film. By optimizing the coating parameters of the gold film, the refractive index (RI) sensitivity of the reflective SPR sensor is demonstrated to be 2110.33 nm/RIU. Then, a multi-layer CS/PAA film is fixed on the surface of the gold film as a mercury ion sensitive film to form a reflective SPR fiber mercury ion sensor. Experimental results demonstrate that the sensor can be used to detect different concentrations of mercury ions with a high sensitivity of 0.5586 nm/μM and good specificity and repeatability. Therefore, the reflective SPR fiber mercury ion sensor shows great promise for future applications of environmental monitoring and drinking water safety.

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A Self Powered Solid-Liquid Contact Electrification Based Nanosensor for Chemically Enhanced Detection of Catechin

ECS Transactions ◽

10.1149/09706.0021ecst ◽

2020 ◽

Vol 97 (6) ◽

pp. 21-26

Author(s):

Subhodeep Chatterjee ◽

Zong-Hong Lin

Keyword(s):

Contact Electrification ◽

Self Powered ◽

Solid Liquid

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Highly sensitive optical ion sensor with ionic liquid-based colorimetric membrane/photonic crystal hybrid structure

Scientific Reports ◽

10.1038/s41598-020-73858-8 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Daiki Kawasaki ◽

Ryoutarou Oishi ◽

Nao Kobayashi ◽

Tatsumi Mizuta ◽

Kenji Sueyoshi ◽

...

Keyword(s):

Ionic Liquid ◽

Photonic Crystal ◽

Optical Measurement ◽

Local Density ◽

Hybrid Structure ◽

Cell Dynamics ◽

Ion Sensor ◽

Ion Sensing ◽

Highly Sensitive ◽

Absorption Sensitivity

Abstract An ionic liquid-based thin (~ 1 µm) colorimetric membrane (CM) is a key nano-tool for optical ion sensing, and a two-dimensional photonic crystal slab (PCS) is an important nano-platform for ultimate light control. For highly sensitive optical ion sensing, this report proposes a hybrid of these two optical nano-elements, namely, a CM/PCS hybrid. This structure was successfully fabricated by a simple and rapid process using nanoimprinting and spin-coating, which enabled control of the CM thickness. Optical characterization of the hybrid structure was conducted by optical measurement and simulation of the reflection spectrum, indicating that the light confined in the holes of the PCS was drastically absorbed by the CM when the spectrum overlapped with the absorption spectrum of the CM. This optical property obtained by the hybridization of CM and PCS enabled drastic improvement in the absorption sensitivity in Ca ion sensing, by ca. 78 times compared to that without PCS. Experimental and simulated investigation of the relation between the CM thickness and absorption sensitivity enhancement suggested that the controlled light in the PCS enhanced the absorption cross-section of the dye molecules within the CM based on the enhanced local density of states. This highly sensitive optical ion sensor is expected to be applied for micro-scale bio-analysis like cell-dynamics based on reflectometric Ca ion detection.

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