01978nas a2200289 4500008004100000022001400041245011000055210006900165260009500234300001200329490000600341520094400347653001401291653002101305653001601326653001101342653002301353653001801376100002501394700001601419700002601435700002901461700002601490700001701516700002601533856012901559 2007 eng d a1550-703300aCdS quantum dots: enzyme mediated in vitro synthesis, characterization and conjugation with plant lectins0 aCdS quantum dots enzyme mediated in vitro synthesis characteriza a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScDEC a406-4130 v33 a

This paper presents the in vitro synthesis of CdS quantum dot nanoparticles using sulphite reductase and capping peptide in the presence of a co-factor alpha-NADPH, their characterization and conjugation with plant lectins, Jacalin and Chick pea lectin. Incubation of sulphite reductase with aqueous CdCl2, Na2SO3, and capping peptide in the presence of a-NADPH, which acts as a co-factor, resulted in the formation of CdS nanoparticles of dimensions 5-20 nm. These CdS nanoparticles were conjugated with plant lectins by EDAC mediated coupling. These observations are of significance, as it will help in the development of eco-friendly process for the formation of CdS nanoparticles and their application as fluorescent biolabels. Moreover the above studies will also help in designing a rational enzymatic strategy for the synthesis of nanomaterials of different chemical composition, shapes and sizes as well as their separation.

10abio-label10aCdS quantum dots10aconjugation10aEnzyme10ain vitro synthesis10aNanoparticles1 aAnsary, Abu, Ayoobul1 aKumar, Anil1 aKrishnasastry, M., V.1 aAbyaneh, Majid, Kazemian1 aKulkarni, Sulabha, K.1 aAhmad, Absar1 aKhan, Mohammad, Islam uhttps://library.ncl.res.in/content/cds-quantum-dots-enzyme-mediated-vitro-synthesis-characterization-and-conjugation-plant-001568nas a2200265 4500008004100000022001400041245007600055210006900131260007400200300001200274490000700286520066600293653002000959653002100979653002201000653002501022100001601047700002901063700001901092700002601111700001901137700001701156700002601173856010301199 2007 eng d a0141-549200aNitrate reductase-mediated synthesis of silver nanoparticles from AgNO30 aNitrate reductasemediated synthesis of silver nanoparticles from aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcMAR a439-4450 v293 a

Synthesis of silver nanoparticles using alpha-NADPH-dependent nitrate reductase and phytochelatin in vitro has been demonstrated for the first time. The silver ions were reduced in the presence of nitrate reductase, leading to the formation of a stable silver hydrosol 10-25 nm diam. and stabilized by the capping peptide. The nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and UV-Vis absorption. These studies will help in designing a rational enzymatic strategy for the synthesis of nanomaterials of different chemical composition, shapes and sizes as well as their separation.

10aCapping Peptide10aenzymatic method10anitrate reductase10asilver nanoparticles1 aKumar, Anil1 aAbyaneh, Majid, Kazemian1 aGosavi, S., W.1 aKulkarni, Sulabha, K.1 aPasricha, Renu1 aAhmad, Absar1 aKhan, Mohammad, Islam uhttps://library.ncl.res.in/content/nitrate-reductase-mediated-synthesis-silver-nanoparticles-agno302017nas a2200265 4500008004100000022001400041245010000055210006900155260010200224300001200326490000700338520101700345653001801362653002301380653002201403653003101425100002401456700002801480700002201508700002201530700001901552700002601571700002401597856013001621 2008 eng d a0250-470700aNew route for preparation of luminescent mercaptoethanoate capped cadmium selenide quantum dots0 aNew route for preparation of luminescent mercaptoethanoate cappe aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScJUN a291-2960 v313 a

We report a synthesis of cadmium selenide quantum dots (Q-CdSe) by refluxing a mixture of cadmium acetate, selenium powder, sodium sulfite and 2-mercaptoethanol in N,N'-dimethyl formamide (DMF)/water solution. X-ray and electron diffractions suggest the formation of hexagonal phase of size quantized CdSe. Based on TEM analysis, the formation of nanoparticles with an average diameter of 3.5 +/- 0.5 nm is inferred. Their sols in DMF and dimethyl sulphoxide (DMSO) gave characteristic absorption peaks at 300 nm and 327 nm, which is attributed to the formation of high quality, size quantized CdSe particles. Extracted particles from the sol were readily redispersed in DMF and DMSO, which were diluted further with water without losing their optical and colloidal properties. FTIR spectroscopy suggested the formation of 2-mercaptoethanol thiolate on the particle surface, with free -OH groups available for linkage. Sols in DMSO and their solutions in water displayed an intense photoluminescence (PL).

10achalcogenides10aChemical synthesis10aphotoluminescence10asemiconductor quantum dots1 aWankhede, Manoj, E.1 aInamdar, Shaukatali, N.1 aDeshpande, Aparna1 aThete, Aniket, R.1 aPasricha, Renu1 aKulkarni, Sulabha, K.1 aHarani, Santosh, K. uhttps://library.ncl.res.in/content/new-route-preparation-luminescent-mercaptoethanoate-capped-cadmium-selenide-quantum-dots-001515nas a2200253 4500008004100000022001400041245008900055210006900144260010600213300001200319490000700331520058000338653002300918653001700941653001900958653001900977653002200996100002201018700002201040700002301062700002701085700002601112856012301138 2009 eng d a0025-540800aEpitaxially grown zinc-blende structured Mn doped ZnO nanoshell on ZnS nanoparticles0 aEpitaxially grown zincblende structured Mn doped ZnO nanoshell o aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB a339-3440 v443 a

Zinc oxide in the bulk as well as in the nanocrystalline form is thermodynamically stable in the wurtzite structure. However, zinc oxide in the zinc-blende structure is more useful than that in the wurtzite structure due to its superior electronic properties as well as possibility of efficient doping. Therefore, zinc oxide shell is grown epitaxially on zinc sulphide core nanoparticles having zinc-blende structure. It is shown that doping of manganese could be achieved in zinc oxide nanoshell with zinc-blende structure. (C) 2008 Elsevier Ltd. All rights reserved.

10aChemical synthesis10aLuminescence10aNanostructures10aSemiconductors10aX-ray diffraction1 aLimaye, Mukta, V.1 aSingh, Shashi, B.1 aDate, Sadgopal, K.1 aGholap, Ramkrishna, S.1 aKulkarni, Sulabha, K. uhttps://library.ncl.res.in/content/epitaxially-grown-zinc-blende-structured-mn-doped-zno-nanoshell-zns-nanoparticles-001760nas a2200229 4500008004100000022001400041245010300055210006900158260009500227300001200322490000800334520089600342653003601238653001901274653000801293100002201301700002201323700001401345700001901359700002601378856012601404 2011 eng d a0022-459600aRoom temperature ferromagnetism in undoped and Fe doped ZnO nanorods: microwave-assisted synthesis0 aRoom temperature ferromagnetism in undoped and Fe doped ZnO nano a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB a391-4000 v1843 a

One-dimensional (1D) undoped and Fe doped ZnO nanorods of average length similar to 1 mu m and diameter similar to 50 nm have been obtained using a microwave-assisted synthesis. The magnetization (M) and coercivity (H-c) value obtained for undoped ZnO nanorods at room temperature is similar to 5 X 10(-3) emu/g and similar to 150 Oe, respectively. The Fe doped ZnO samples show significant changes in M -H loop with increasing doping concentration. Both undoped and Fe doped ZnO nanorods exhibit a Curie transition temperature (T-c) above 390 K. Electron spin resonance and Mossbauer spectra indicate the presence of ferric ions. The origin of ferromagnetism in undoped ZnO nanorods is attributed to localized electron spin moments resulting from surface defects/vacancies, where as in Fe doped samples is explained by F center exchange mechanism. (C) 2010 Published by Elsevier Inc.

10aDiluted magnetic semiconductors10aNanostructures10aZnO1 aLimaye, Mukta, V.1 aSingh, Shashi, B.1 aDas, Raja1 aPoddar, Pankaj1 aKulkarni, Sulabha, K. uhttps://library.ncl.res.in/content/room-temperature-ferromagnetism-undoped-and-fe-doped-zno-nanorods-microwave-assisted-002832nas a2200193 4500008004100000022001400041245014300055210006900198260007100267300001600338490000800354520204500362100002602407700001402433700001702447700001902464700002602483856012902509 2012 eng d a1932-744700aObservation of enhanced dielectric coupling and room-temperature ferromagnetism in chemically synthesized BiFeO3@SiO2 core-shell particles0 aObservation of enhanced dielectric coupling and roomtemperature  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP a19503-195110 v1163 a

We report the effect of SiO2 coating on the structural, magnetic, and dielectric properties of chemically synthesized high-purity BiFeO3 particles. The assynthesized BiFeO3 particles demonstrate properties comparable with those reported for bulk BiFeO3. On the other hand, the structural measurement on BiFeO3@SiO2 shows that the SiO2 coating has anisotropically compressed the lattice of BiFeO3 particles and stimulates the variation in the electron density. This affects magnetic and dielectric behavior of material. Frequency-dependent dielectric constant study at low temperature (20-325 K) revealed slight reduction (8-10%) in the dielectric constant of BiFeO3@SiO2 particles compared to uncoated BiFeO3 particles. The study reveals five anomalies at 234, 206, 146, 84, and 25 K located in close proximity to the linear magnetodielectric coupling and spin reorientation transitions. The loss tangent (approximate to 10(-3)) and alternating current (ac) conductivity (approximate to 10(-8) Omega(-1)cm(-1)) of BiFeO3@SiO2 particles are orders of magnitude lower than those observed for the BiFeO3 particles. The magnetic measurement shows the existence of room-temperature ferromagnetism in BiFeO3@SiO2 particles with average value of magnetic moment per Fe atom approximate to 0.030 mu(B) and appreciable coercivity as high as 120 Oe. The canted spin structure in the surface shell of BiFeO3@SiO2 particles show an enhanced magnetic property and shifted hysteresis loop. The magnetic measurement in close proximity to dielectric transitions revealed enhanced magnetization, suggesting the presence of anisotropies. It has been observed that SiO2 coating alters the properties of BiFeO3 particles. Our dielectric and magnetic measurements show enhanced coupling among the electric and magnetic ordered parameters in BiFeO3@SiO2 core-shell particles compared to uncoated BiFeO3 particles. The magnetic and dielectric properties of SiO2-coated BiFeO3 are similar to nanoparticles of BiFeO3 where interface plays a significant role.

1 aShirolkar, Mandar, M.1 aDas, Raja1 aMaity, Tuhin1 aPoddar, Pankaj1 aKulkarni, Sulabha, K. uhttps://library.ncl.res.in/content/observation-enhanced-dielectric-coupling-and-room-temperature-ferromagnetism-chemically-002691nas a2200241 4500008004100000022001400041245009200055210006900147260000900216300001400225490000700239520188500246653002402131653002002155653001802175653001802193100002102211700002102232700001902253700002602272700002402298856012702322 2023 eng d a1530-437X00aSelf-powered wearable breath sensor cum nanogenerator using AuNR-rGO-PVDF nanocomposite0 aSelfpowered wearable breath sensor cum nanogenerator using AuNRr cAPR  a6473-64800 v233 a

Breathing is the most important function of living being. It is well known that breath contains 90% humidity along with various gases and volatile organic compounds (VOCs). These gases are released during various metabolic activities in the body. These gases present in the breath can act as biomarkers to showcase healthiness or abnormalities in the body. Therefore, breath sensors are the need of time to detect diseases at early stages and in noninvasive way. Herein, we report, simple breath sensor using Au nanorods (AuNRs) and its nanocomposite with reduced graphene oxide (rGO) and polyvinylidene fluoride (PVDF). The nanocomposites system is designed in such a way that each component has its advantages for breath sensing. Here, AuNR being a good humidity sensitive material detects the breath efficiently. The ss phased PVDF being a very good ferroelectric material, contributes for voltage generation during sensing and enables the device to be self powered. The highly conducting rGO increases the sensitivity and voltage generation by facilitating the electron transport in the nanocomposite system. The nanocomposite was optimized with respect to PVDF, rGO and Au concentration. The as-synthesized materials were characterized by physiochemical characterization techniques such as field emission scanning electron microscopy (FESEM), X-ray diffraction analysis (XRD), UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The ss phase formation of the PVDF was confirmed from the XRD peak at 20.41 degrees. SEM results revealed that AuNR have length 15-20 nm and aspect ratio similar to 3-4. Breath sensing tests were carried out for as synthesized nanocomposite material. The nanocomposite exhibited high sensitivity towards breath and generated the voltage of similar to 0.7 V within 0.8 s.

10aAu nanorods (AuNRs)10abreath analyzer10abreath sensor10ananogenerator1 aBang, Amruta, D.1 aGhalawat, Monika1 aPoddar, Pankaj1 aKulkarni, Sulabha, K.1 aAdhyapak, Parag, V. uhttps://library.ncl.res.in/content/self-powered-wearable-breath-sensor-cum-nanogenerator-using-aunr-rgo-pvdf-nanocomposite