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Green synthesis of polysaccharide/gold nanoparticle nanocomposite: An efficient ammonia sensor

Pandey, Sadanand and Goswami, Gopal K and Nanda, Karuna K (2013) Green synthesis of polysaccharide/gold nanoparticle nanocomposite: An efficient ammonia sensor. In: Carbohydrate Polymers, 94 (1). pp. 229-234.

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Official URL: http://dx.doi.org/10.1016/j.carbpol.2013.01.009


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.

Item Type: Journal Article
Publication: Carbohydrate Polymers
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Guar Gum; Gold Nanoparticles; Green Synthesis
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 30 May 2013 11:14
Last Modified: 30 May 2013 11:14
URI: http://eprints.iisc.ac.in/id/eprint/46599

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