Green synthesis of biopolymer-silver nanoparticle nanocomposite: An optical sensor for ammonia detection

Pandey, Sadanand and Goswami, Gopal K and Nanda, Karuna K (2012) Green synthesis of biopolymer-silver nanoparticle nanocomposite: An optical sensor for ammonia detection. In: International Journal of Biological Macromolecules, 51 (4). pp. 583-589.

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Abstract

Biopolymer used for the production of nanoparticles (NPs) has attracted increasing attention. In the presence article we use aqueous solution of polysaccharide Cyamopsis tetragonaloba commonly known as guar gum (GG), from plants. GG acts as reductive preparation of silver nanoparticles which are found to be <10. nm in size. The uniformity of the NPs size was measured by the SEM and TEM, while a face centered cubic structure of crystalline silver nanoparticles was characterized using powder X-ray diffraction technique. Aqueous ammonia sensing study of polymer/silver nanoparticles nanocomposite (GG/AgNPs NC) was performed by optical method based on surface plasmon resonance (SPR). The performances of optical sensor were investigated which provide the excellent result. The response time of 2-3. s and the detection limit of ammonia solution, 1. ppm were found at room temperature. Thus, in future this room temperature optical ammonia sensor can be used for clinical and medical diagnosis for detecting low ammonia level in biological fluids, such as plasma, sweat, saliva, cerebrospinal liquid or biological samples in general for various biomedical applications in human. © 2012 Elsevier B.V.

Item Type:	Journal Article
Publication:	International Journal of Biological Macromolecules
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier SCience
Keywords:	Ammonia sensor;Biopolymer;Silver nanoparticles;Nanocomposite; Surface Plasmon resonance
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	18 Sep 2012 05:06
Last Modified:	18 Sep 2012 05:07
URI:	http://eprints.iisc.ac.in/id/eprint/45026

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