Document Type : Research Article
Authors
1 Department of Physics, Kurukshetra University, Kurukshetra 136119, India
2 Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India
Abstract
Bio-degradable polymers such as starch, chitosan, cellulose etc which are extracted from renewable resources are attracting increasing interest in the recent years due to their environmentally friendly nature, low cost and high availability. In the present work, synthesis of colloidal silver nanoparticles and subsequently Ag-starch nanocomposite films were carried out via a green process. For synthesis of Ag nanoparticles water, soluble starch and fructose have been used as solvent, reducing agent and stabilizing agent respectively. The effect of varying concentration of colloidal Ag nanoparticles on the optical and structural properties of starch was investigated. The structural analysis of the nanocomposites was carried out using Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM). Size of the Ag nanoparticles from TEM micrograph comes out to be 10.75 ± 0.8 nm in the starch matrix. UV-visible absorption was further utilized to ascertain various optical constants like optical energy gap, Urbach’s energy, optical conductivity etc. The optical energy gap of starch decreases from 4.08 eV to 2.21 eV for Ag-starch nanocomposite film containing 0.50 wt% of Ag nanoparticles and the Urbach’s energy increases from 0.77 eV to 1.37 eV. Copyright © 2017 VBRI Press.
Keywords
2004.
2.Kreibeg, U.;Vollmer, M.;Optical Properties of Metal Clusters,
Springer, 1995.
3.Sharma, R.; Bhalerao, S.; Gupta, D.; Org. Electron., 2016, 33, 274.
DOI:10.1016/j.orgel.2016.03.030
4.Zhou, C.; Opt. Lasers Eng., 2012, 50, 1592.
DOI:10.1016/j.optlaseng.2012.05.020
5.Raj, D. R.; Prasanth, S.; Vineeshkumar, T. V.; Sudarsanakumar,
C.; Sens. Actuators B, 2015, 224, 600.
DOI: 10.1016/j.snb.2015.10.106
6.Joseph,S.; Mathew, B.;Mater. Sci. Eng., B, 2015, 195, 90.
DOI: 10.1016/j.mseb.2015.02.007
7.Chevirona, P.; Gouanvéa, F.; Espuche, E.; Carbohydr. Polym.,
2015, 134, 635.
DOI:10.1016/j.carbpol.2015.07.067
8.Pinto, R. J.B.; Fernandes,S. C.M.; Freire, C. S.R.; Sadocco,P.;
Causio,J.; Neto, C. P.; Trindade, T.; Carbohydr. Res., 2012, 348,
77.
DOI: 10.1016/j.carres.2011.11.009
9.Bozanic, D. K.; Djokovic,V.; Blanusa,J.; Nair,P. S.; Zeorges,M.
K.;Radhakrishnan, T.; Eur. Phys. J. E,2007, 22, 51.
DOI: 10.1140/epje/e2007-00008-y
10.Bastioli, C.; Handbook of Biodegradable Polymers, Rapra
Technology Limited, UK.
11.Yoksan,R.; Chirachanchai, S.; Mater. Sci. Eng. C,2010, 30, 891.
DOI:10.1016/j.msec.2010.04.004
12.Cheng, F.; Betts, J.W.; Kelly, S.M.; Hector, A.L.; Mater. Sci.
Eng. C, 2015, 46, 530.
DOI:10.1016/j.msec.2014.10.041
Acta Mol. Biomol. Spectrosc., 2015, 140, 265.
DOI:10.1016/j.saa.2014.12.065
14.Hebeish, A.; Shaheen, Th. I. ; El-Naggar, M. E.; Int. J. Biol.
Macromol., 2016, 87, 70.
DOI:10.1016/j.ijbiomac.2016.02.046
15.Hassanien, A.S.; AKL, A.A.; Superlattices Microstruct., 2016, 89,
153.
DOI:10.1016/j.spmi.2015.10.044
16.Chevirona, P.; Gouanvéa, F.; Espuche, E.; Carbohydr. Polym.,
2014, 108, 291.
DOI:10.1016/j.carbpol.2014.02.059
17.Tagad, C. K.; Dugasani, S. R.; Aiyer, R.; Park, S.; Kulkarni, A.;
Sabharwal, S.; Sens. Actuators, B, 2013, 183, 144
DOI: 10.1016/j.snb.2013.03.106
18.Pandey, S.; Goswami, G. K.; Nanda, K. K.; Int. J. Biol.
Macromol., 2012, 51, 583.
DOI:10.1016/j.ijbiomac.2012.06.033
19.Davis, E.; Mott, N.F.;Electronic Processes in Non-Crystalline
Materials, OxfordUniversity Press Inc., USA, 1970.
20.Krstic, J.;Spasojevic, J.; Radosavljevic, A.; Siljegovc, M.;
Popovic Z. K.; Radiat. Phys. Chem.;2014, 96,158.
DOI:10.1016/j.radphyschem.2013.09.013
21.Agarwal, S.; Saraswat, V. K.; Opt. Mater., 2015, 42, 335.
DOI: 10.1016/j.optmat.2015.01.024
22.Devi, U. C.; Sharma, A. K.;Rao, V. V. R. N.;Mater. Lett.2002,
56, 167.
DOI:10.1016/S0167-577X(02)00434-2
23.Mahmoud, K.H.; Spectrochim. Acta, Part A: Mol. Biomol.
Spectros.,2015, 138,434.
DOI: 10.1016/j.saa.2014.11.074
24.Urbach,F.; Phys. Rev.1953, 92, 1324.
DOI:10.1103/PhysRev.92.1324
25.Gherbi, R.; Bessekhouad, Y.; Trari, M.; J. Phys. Chem. Solids,
2016, 89, 69.
DOI: 10.1016/j.jpcs.2015.10.019
26.Bouarissa, N.; Gueddim, A.; Siddiqui, S.A.; Boucenna, M.; Al-
Hajry, A.; Superlattices. Microstruct.,2014, 72, 319.
DOI:10.1016/j.spmi.2014.05.010
27.Yang, C. H.; Ao, Z. M.; .Li, Q. F.; .Jiang, J. J.;Opt. Commun,
2015, 338, 145.
DOI:10.1016/j.optcom.2014.09.066
)