Room temperature trimethylamine gas sensor based on aqueous dispersed graphene

Luigi Ermenegildo Sangaletti, Elisabetta Comini, Rey Alfred G. Ranola, Isabella Concina, Fortunato B. Sevilla, Matteo Ferroni, Giorgio Sberveglieri

Risultato della ricerca: Contributo in libroContributo a convegno

2 Citazioni (Scopus)

Abstract

A water dispersible graphene polymer nanocomposite was synthesized by solution blending method and deposited on a nylon-6 membrane via vacuum assisted self - Assembly (VASA) method to fabricate a flexible material applied as a chemoresistive gas sensor for trimethylamine (TMA). The morphological and structural characterization of graphene/polystyrene-sulfonate nanocomposite were carried out by using Fourier-Transform infrared (FT-IR) spectroscopy, Raman spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy and field-effect scanning electron (FE-SEM) microscope. While, electrical conductivity was measured using a four-point probe measurement. The prepared polymer nanocomposite has a percolation threshold around 0.30% vol. fraction, with a conductivity of 2.45 S/m (rsd = 3.0%, n=3). The response of the composite sensor exhibited linear range from 23 to 183 mg/L (r2=0.95713) and the sensitivity was at 1.72 × 10-3 ΔR/R mg L-1. The gas sensor exhibited repeatable response to TMA gas and the calculated limit of detection was at 22.67 mg/L.
Lingua originaleEnglish
Titolo della pubblicazione ospiteProceedings of the 2015 18th AISEM Annual Conference, AISEM 2015
Pagine1-4
Numero di pagine4
DOI
Stato di pubblicazionePubblicato - 2015
Evento18th Conference on Sensors and Microsystems, AISEM 2015 - Fondazione Bruno Kessler, Trento, Italy
Durata: 3 feb 20155 feb 2015

Convegno

Convegno18th Conference on Sensors and Microsystems, AISEM 2015
CittàFondazione Bruno Kessler, Trento, Italy
Periodo3/2/155/2/15

Keywords

  • Computer Science Applications1707 Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • graphene
  • polymer nanocomposites
  • trimethylamine & chemiresistor

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