A paper based microfluidic device for the detection of arsenic using a gold nanosensor

Abstract

A paper based microfluidic device is fabricated that can rapidly detect very low concentrations of As3+ ions using a gold nanosensor, Au–TA–TG.

Gold nanoparticle embedded paper with mechanically exfoliated graphite as flexible supercapacitor electrodes

“…The AuNPs were prepared using 50.0 µl of 0.1M HAuCl 4 and 5.0 mg/ml sodium citrate solutions stirred at 90°C as in the reported literature. 24 The paper pieces were dried in an oven at 60 °C. Graphitic layers were then exfoliated on the AuNP-paper surface mechanically using a set up designed for this purpose (Fig.…”

Tuning Gold Nanoparticle Aggregation through the Inhibition of Acid Phosphatase Bioactivity: A Plasmonic Sensor for Light‐Up Visual Detection of Arsenate (AsV)

“…Since this is the first AuNP‐based plasmonic sensor for As V only, comparison of the visual detection limits among different sensors cannot be done. On the other hand, compared to plasmonic nanosensors for As III , the present one may not be advantageous in the spectral limit of detection but shows comparable visual detection limit. Although this visible limit of detection is somewhat higher than the maximum arsenic level in drinking water set by the WHO, our method may find prospective application in arsenic testing, owing to its simplicity, at fields where relatively high concentrations of As V are expected.…”

Microfluidics‐Implemented Biochemical Assays: From the Perspective of Readout

“…C) Schematic of the paper‐based microfluidic device for detecting arsenic metal ions via plasmonic gold nanoparticles. Reproduced with permission . Copyright 2014, Royal Society of Chemistry.…”