2013 - industrical c & p

Industrial Crop s and Prod ucts 41 (2013) 235–240 Conte nts lists availableat SciVerseScienceDirect IndustrialCropsand Pr odu cts j ournal h om epage: www.elsevier.com/locate/indcrop Shortcommunication Biosynthesis, characterisationand anti- bact erial effectof plant-mediatedsilver nanoparticlesusing Artemisianilagirica M. Vija yakumar a,∗ , K. Priya b , F. T. Nanc y b , A. Noorli dah a , A.B. A. Ahmed a a Insti tute of Biolog ical Scienc es, Facul ty of Scienc e, Univer sity of Malay a, Kuala Lumpu r 50603 , Malay sia b Depar tment of Bioch emistr y, PSGCol leg e of Artsand Scienc e, Coimb atore 64101 4, Tamil nadu, India art i c l ei n fo Article history: Rece ived 25 January 2012 Rece ived inrev ise d for m5April2012 Acce pted 9April2012 Keywords: Silvernanoparticles Green synthesis Antibacterial activity Artemisianilagirica ab st rac t Currently, there isanincreasing commercial dema nd fornanoparticles duetotheirwideapplicabil ity in variousmarkets, suchasmedic ine,catalysi s, elect ronics , chemistryand energ y. In thisreport ,a simpl eand eco-friendly chemical reactionforthesynthesisof silvernanoparticles (AgNPs) from Artemisianilagirica (Asteraceae) hasbeendevel oped.Silver nitratewasuse d asthemetalprecursor and hydrazinehydrate as a red uci ng age nt. Sca nning ele ctr on micros copy (SEM) and energy-dispersive spect roscop y (EDX) were used to characterisethenanoparticles obt ain ed from A. nilagirica. Themor pho logy of theAgNPswas det ermine d by SEMan d theaveragediameterof theparticleswasdeter mined as70–90nm. Th eEDX analysisof thenanoparticles dis per sio n, usi ng a ran geof 2–4keV, confirmed the presenceof elemental silv er, with nootherimpur ity peaks detec ted. Inaddi tion, thechar acteri sed AgNP shasthepotential for variousmedical and industrial appli cations. Theresultsshowed that microbial susce ptibil ity toAgNPsis different foreachmicroorganism. © 2012 Elsevier B.V. All r ights reserved. 1.Introduction Nanop artic les area spe cialgroup of mat eri als wit h uni que fea- tu res an d e xt e ns i ve ap pl ic at ions in di v erse fiel ds (Mateietal., 2008). Stu dyi ng these par tic ula r features has al ways been of great interesttomanyscientis ts. Infact,nanopar ticle s disp laycompletel y uniqu e prop erties incomp ariso n with theirlarge-size counterparts (Pri yan ka etal ., 2009). Alar ge number of materials which were consi dered tobesafeactual ly develop tox ici ty atnanos ize range s (Redd y etal.,2007), whichis mainl y relat ed totheincreased specific surf ace area and hi gh rea cti vit y of nanosi ze mat eri als (Nagarajan and Rajag opala n, 2008). Alargersurface area, as incaseof nanopar- ti cl es, ensures an increased range of pro bab le int eracti ons wit h bio- organ ics that arepresentonthevi able cel lsurf a ce (Rizwan etal., 2010). Theconsiderable antimicrobial activities of inorganic metaloxi de nanopa rti cles, suc hasZnO, MgO, Ti O 2 an d Si O 2 , and theirselective toxici ty to biological sy s te ms suggests a po ten- tialapp lic ati on asthera peut ics, diagn ostic s, surgic al dev ices and nanomedicine-based antimicrobial agents (Sob ha et al. , 2010). Thesynt hes is of metalnanoparticles and nanostruct ur ed ma teri al s isattracti ng at tent ion inrecentr es ea r ch be c au se of theirvalu a bl e pr op e rt i es whic h ma ke th em us ef ul forcatalysis (Nar ay a nan and El- Sa ye d, 200 4), sensorte chnolo gy (Gomez- Romero, 2001), and thebiological labell ing of opto-electronic ∗ Corr espo nding auth or. Tel.: +601432 02066 ; fax: +60379674178. E-mail addres s: [email protected] (M. Vijayakumar ). recorded medi a and opti cs (Gra cia s etal. , 2002). Gener ally , meta l nanopa rti cles can bepr epared and st ab il is ed by ph ys ic al and chemicalmet hod s, but thechemical approaches, such as chem- icalreduc tion, elect ro-ch emica ltechniques and photochemical reduc tion, aremostwi dely u se d (Chen et al., 2001; Fratti nietal., 2005). St ud ie s ha ve sh own th atthesizemor pho log y sta bil ity and chemi cal–p hysica lpro per tie s of themetalnanop articles are str ongly influen ced by the experimental conditions, thekinetics of the interaction of metalionswithred uci ng agents, and the adsorp- tio n pro ces ses of stab ilisin g agents with metalnanop arti cles (Knoll and Keilmann,1999; Sengu pta etal.,2005). Hence,thedesignof the synth esis meth od inwhichthesizemorp holog y, stab ilityand prop - erti es arecontro lled has be come a ma jorfield of interest(Wiley etal. , 2007). Chemical reduct ion is themostfr equent ly appl ied method forthepr epar at ion of silver(Ag)nanopa rti cles asst able, col- loidaldis per sions inwateroror ganic solvents (Taoetal., 2006). The reduct ion of silverions(Ag + )inaqu eous sol uti ons genera lly yield s collo idal silverwithpartic le dia meters of severalnanome- tres(Wileyetal.,2005). Initially, theredu ctionof various complexes withAg + ionsleadstotheformat ion of silvera to ms, wh ic h is followed by aggl omeration intool igomeric clusters. These cl us- terseventua lly lea d totheforma tion of colloidalpar tic les (Kapoor etal., 1994). Whe n the colloidal parti cles aremuch smal lertha n the wavele ngth of vis ibl e lig ht, the sol uti ons have a yel lowcolourwith an intense band inthe380–400nmrange and oth er lessint ense or smal ler bands at longerwavelengt hs inthe abso rptio n spect rum (Tes sie r et al. , 2000). 0926-669 0/$ –seefrontmatter © 2012 Elsevier B.V. All rights reserved. http://dx.doi.org /10.1016/j. indcrop.2012.04 .017

2013 - industrical c & p

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