01760nas 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<p>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.</p>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-002361nas a2200265   4500008004100000022001400041245011400055210006900169260009900238300001200337490000600349520141000355653001901765653002301784653002001807653001201827653001801839100001501857700002201872700001401894700002201908700001901930700002201949856012401971       2015                        eng d  a1998-012400aSelf-assembled vertically aligned gold nanorod super-lattices for ultra-high sensitive detection of molecules0 aSelfassembled vertically aligned gold nanorod superlattices for   aTSINGHUA UNIV, RM A703, XUEYAN BLDG, BEIJING, 10084, PEOPLES R CHINAbTSINGHUA UNIV PRESScMAR  a907-9190 v83 a<p>We show that self-assembled vertically aligned gold nanorod (VA-GNRs) superlattices can serve as probes or substrates for ultra-high sensitive detection of various molecules. D-glucose and 2,4,6-trinitrotoluene (TNT) have been chosen as model systems due to their very low Raman cross-sections (5.6 x 10(-30) cm(2).molecule(-1).sr(-1) for D-glucose and 4.9 x 10(-31) cm(2). molecule(-1).sr(-1) for TNT) to show that the VA-GNR superlattice assembly offers as low as yoctomole sensitivity. Our experiment on mixed samples of bovine serum albumin (BSA) and D-glucose solutions demonstrate sensitivity for the latter, and the possible extension to real samples. Self-assembled superlattices of VA-GNRs were achieved on a silicon wafer by depositing a drop of solvent containing the GNRs and subsequent solvent evaporation in ambient conditions. An additional advantage of the VA-GNR monolayers is their extremely high reproducible morphology accompanied by ultrahigh sensitivity which will be useful in many fields where a very small amount of analyte is available. Moreover the assembly can be reused a number of times after removing the already present molecules. The method of obtaining VA-GNRs is simple, inexpensive and reproducible. With the help of simulations of monolayers and multilayers it has been shown that superlattices can achieve better sensitivity than monolayer assembly of VA-GNRs.</p>10aNanostructures10aRaman spectroscopy10aself-assemblies10asensors10asuperlattices1 aApte, Amey1 aBhaskar, Prashant1 aDas, Raja1 aChaturvedi, Smita1 aPoddar, Pankaj1 aKulkarni, Sulabha  uhttps://library.ncl.res.in/content/self-assembled-vertically-aligned-gold-nanorod-super-lattices-ultra-high-sensitive-0