期刊
CARBOHYDRATE POLYMERS
卷 94, 期 1, 页码 229-234出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.01.009
关键词
Guar gum; Gold nanoparticles; Green synthesis
资金
- University Grant Commission (UGC)
- Robert Bosch Center for Cyber Physical Systems
A low cost eco-friendly method for the synthesis of gold nanoparticles (AuNPs) using guar gum (GG) as a reducing agent is reported. The nanoparticles obtained are characterized by UV-vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Based on these results, a potential mechanism for this method of AuNPs synthesis is discussed. GG/AuNPs nanocomposite (GG/AuNPs NC) was exploited for optical sensor for detection of aqueous ammonia based on surface plasmon resonance (SPR). It was found to have good reproducibility, response times of similar to 10 s and excellent sensitivity with a detection limit of 1 ppb (parts-per-billion). This system allows the rapid production of an ultra-low-cost GG/AuNPs NC-based aqueous ammonia sensor. (C) 2013 Elsevier Ltd. All rights reserved.
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