02049nas a2200325   4500008004100000022001400041245014200055210006900197260012500266300002300391490000700414520071600421653003101137653003301168653002401201653003001225653002901255653002801284653004801312653003501360653003701395653002401432100002001456700002501476700002001501700001901521700002401540700002901564856013001593       2010                        eng d  a0003-695100aNanoscale modulation of electronic states across unit cell steps on the surface of an epitaxial colossal magnetoresistance manganite film0 aNanoscale modulation of electronic states across unit cell steps  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScJUN  aArticle No. 2631080 v963 a<p>The nature of electronic states near the edge of unit cell steps on the surface of epitaxial La(0.7)Sr(0.3)MnO(3) (LSMO) thin films grown by real-time reflection high energy electron diffraction monitored pulsed laser deposition is examined by scanning tunneling microscopy and scanning tunneling spectroscopy techniques. It is observed that the electronic states are strongly modulated near the step edge with considerably high gap at the edge and low gap on the terrace. This modulation weakens at low temperature. The temperature evolution of the density of states and the nature of gap in deep metallic state of LSMO are also discussed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3455886]</p>10acolossal magnetoresistance10aelectronic density of states10alanthanum compounds10amagnetic epitaxial layers10aNanostructured materials10apulsed laser deposition10areflection high energy electron diffraction10ascanning tunnelling microscopy10ascanning tunnelling spectroscopy10astrontium compounds1 aRana, Abhimanyu1 aBogle, Kashinath, A.1 aGame, Onkar, S.1 aPatil, Shankar1 aValanoor, Nagarajan1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/nanoscale-modulation-electronic-states-across-unit-cell-steps-surface-epitaxial-colossal-001886nas a2200253   4500008004100000022001400041245008200055210006900137260010600206300001400312490000700326520094000333653003101273653004301304653001701347100002001364700001801384700002401402700002001426700002301446700002001469700002901489856011401518       2011                        eng d  a0038-092X00aEnhanced DSSC performance with high surface area thin anatase TiO2 nanoleaves0 aEnhanced DSSC performance with high surface area thin anatase Ti  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUN  a1213-12190 v853 a<p>Thin anatase TiO2 nanoleaves (NLs) with high surface area (similar to 93 m(2)/g) are synthesized by hydrothermal route and dye-sensitized solar cells (DSSC) made using such NLs are compared with those made with hydro-thermally synthesized TiO2 nanoparticles and the Degussa P25 powder. The NLs-based DSSCs show increment of 16% and 24% in the total conversion efficiency over the cells made with NPs and P25 respectively. Interestingly, the highest increment in the conversion efficiency (similar to 35%) is achieved for cells made using a 50:50 (wt/wt) mixture of NLs and NPs. In this case the dye loading is found to be &gt;50% higher than the case of NP films. Moreover the DC resistance of diffusion of I-3(-) in electrolyte (as revealed by the electrochemical impedance spectroscopy) is substantially lower than the NP film case, other cell parameters being nominally comparable. (C) 2011 Elsevier Ltd. All rights reserved.</p>10aDye-sensitized solar cells10aElectrochemical impedance spectroscopy10ahydrothermal1 aDhas, Vivek, V.1 aMuduli, Subas1 aAgarkar, Shruti, A.1 aRana, Abhimanyu1 aHannoyer, Beatrice1 aBanerjee, Rahul1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/enhanced-dssc-performance-high-surface-area-thin-anatase-tio2-nanoleaves-001393nas a2200241   4500008004100000022001400041245012700055210006900182260011000251300001400361490000700375520044900382100002400831700002000855700001700875700002000892700001700912700002500929700001800954700002300972700002500995856013101020       2011                        eng d  a1463-926200aFrom graphite oxide to highly water dispersible functionalized graphene by single step plant extract-induced deoxygenation0 aFrom graphite oxide to highly water dispersible functionalized g  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a1990-19960 v133 a<p>We report a single step facile synthesis of highly water dispersible functionalized graphene nanosheets by plant extract-induced deoxygenation of graphite oxide (GO). The results of various characterizations reveal that the properties of such plant extract-converted graphene nanosheets (PCGN) are comparable to chemically converted graphene nanosheets (CCG). These results open a green route to the emerging graphene-based technologies.</p>1 aMhamane, Dattakumar1 aRamadan, Wegdan1 aFawzy, Manal1 aRana, Abhimanyu1 aDubey, Megha1 aRode, Chandrashekhar1 aLefez, Benoit1 aHannoyer, Beatrice1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/graphite-oxide-highly-water-dispersible-functionalized-graphene-single-step-plant-extract-001630nas a2200241   4500008004100000022001400041245010900055210006900164260010600233300001400339490000800353520069400361653002401055653002801079653000901107653003401116100002001150700002001170700002001190700002401210700002901234856012501263       2011                        eng d  a0038-109800aStrong electric field modulation of transport in PVDF/MWCNT nanocomposite near the percolation threshold0 aStrong electric field modulation of transport in PVDFMWCNT nanoc  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcNOV  a1612-16150 v1513 a<p>A nanocomposite comprising of multiwalled carbon nanotubes (MWCNT) embedded in ferroelectric Poly(vinylidene fluoride) PVDF polymer matrix is examined for electric field induced transport modulation. The pulsed laser deposition (PLD) grown thin films of the nanocomposite with different MWCNT content were characterized. When used as a channel layer in a field effect transistor configuration, a strong electric field modulation of the transport was realized just below the percolation threshold. We believe that this nanocomposite non-percolating channel concept can provide several opportunities for FET devices for organic electronics. (C) 2011 Elsevier Ltd. All rights reserved.</p>10aField effect device10apulsed laser deposition10aPVDF10aScanning tunneling microscopy1 aChanmal, Chetan1 aDeo, Meenal, S.1 aRana, Abhimanyu1 aJog, Jyoti, Prakash1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/strong-electric-field-modulation-transport-pvdfmwcnt-nanocomposite-near-percolation-002834nas a2200253   4500008004100000022001400041245009400055210006900149260007100218300001400289490000700303520192800310100002702238700002202265700001802287700002002305700001902325700002402344700001702368700003202385700002402417700001902441856012002460       2012                        eng d  a0024-929700aLamellar melting, not crystal motion, results in softening of polyoxymethylene on heating0 aLamellar melting not crystal motion results in softening of poly  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAUG  a5967-59780 v453 a<p>We probe temperature-dependent changes in the semicrystalline microstructure of polyoxymethylene using a combination of modulated DSC, SAXS, and solid-state NMR to characterize macroscopic behavior, lamellar-level structure, and molecular environments, respectively, and correlate these with the change in mechanical properties probed using DMA and AFM. Two model samples are investigated: a melt crystallized sample prepared by injection molding and a sample obtained by crystallization from dilute solution. Our investigations reveal that, for both samples, there is an increase in crystalline motions and in the amorphous content on heating. DMA and AFM measurements reveal that the modulus of the molded sample decreases on heating to about 100 degrees C; however, there is a significant difference in behavior of the solution crystals, where we observe no significant decrease in stiffness (from AFM measurements). Thus, in contrast to previous reports, we demonstrate that the decrease in modulus on heating polyoxymethylene does not correlate with chain motions in the crystalline regions. We use SAXS to probe the semicrystalline morphology for the samples on heating and show that, for the molded sample, there is a distribution of lamellar thickness at room temperature and that the thin lamellae in this distribution melt on heating. In contrast to the behavior of the melt crystallized samples, the solution crystals exhibit no change in the lamellar stacking on heating to 150 degrees C. We also demonstrate that, on heating, the amorphous regions in the solution crystals always appear to have restricted mobility while there are mobile and low mobility amorphous regions in the molded samples. Our results suggest that, contrary to conventional belief, the decrease in modulus on heating polyoxymethylene arises not from motions in the crystalline lamellae but primarily from melting of thin lamellae.</p>1 aKumaraswamy, Guruswamy1 aSurve, Nikita, S.1 aMathew, Renny1 aRana, Abhimanyu1 aJha, Saroj, K.1 aBulakh, Neelima, N.1 aNisal, Anuya1 aAjithkumar, Thalasseril, G.1 aRajamohanan, P., R.1 aRatnagiri, Ram  uhttps://library.ncl.res.in/content/lamellar-melting-not-crystal-motion-results-softening-polyoxymethylene-heating-002136nas a2200313   4500008004100000022001400041245010700055210006900162260007400231300000800305490000700313520111700320653001401437653001201451653001701463653001601480653001001496653001201506653001701518100001601535700001501551700002101566700002001587700001601607700002401623700002501647700001901672856013101691       2012                        eng d  a1388-076400aQuantum dot bio-conjugate: as a western blot probe for highly sensitive detection of cellular proteins0 aQuantum dot bioconjugate as a western blot probe for highly sens  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcMAR  a7320 v143 a<p>In the present study, we report a quantum dot (QD)-tailored western blot analysis for a sensitive, rapid and flexible detection of the nuclear and cytoplasmic proteins. Highly luminescent CdTe and (CdTe) ZnS QDs are synthesized by aqueous method. High resolution transmission electron microscopy, Raman spectroscopy, fourier transform infrared spectroscopy, fluorescence spectroscopy and X-ray diffraction are used to characterize the properties of the quantum dots. The QDs are functionalized with antibodies of prostate apoptosis response-4 (Par-4), poly(ADP-ribose) polymerases and beta actin to specifically bind with the proteins localized in the nucleus and cytoplasm of the cells, respectively. The QD-conjugated antibodies are used to overcome the limitations of conventional western blot technique. The sensitivity and rapidity of protein detection in QD-based approach is very high, with detection limits up to 10 pg of protein. In addition, these labels provide the capability of enhanced identification and localization of marker proteins in intact cells by confocal laser scanning microscopy.</p>10aDetection10aImaging10ananomedicine10aquantum dot10aRapid10asensors10aWestern blot1 aKale, Sonia1 aKale, Anup1 aGholap, Haribhau1 aRana, Abhimanyu1 aDesai, Rama1 aBanpurkar, Arun, G.1 aOgale, Satishchandra1 aShastry, Padma  uhttps://library.ncl.res.in/content/quantum-dot-bio-conjugate-western-blot-probe-highly-sensitive-detection-cellular-proteins-001894nas a2200241   4500008004100000022001400041245009000055210006900145260007700214300001400291490000700305520103300312100002001345700001601365700002501381700001401406700002001420700002001440700002201460700002501482700002401507856012101531       2014                        eng d  a1616-301X00aScaling behavior of resistive switching in epitaxial bismuth ferrite heterostructures0 aScaling behavior of resistive switching in epitaxial bismuth fer  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL  a3962-39690 v243 a<p>Resistive switching (RS) of (001) epitaxial multiferroic BiFeO3/La0.67Sr0.33MnO3/SrTiO3 heterostructures is investigated for varying lengths scales in both the thickness and lateral directions. Macroscale current-voltage analyses in conjunction with local conduction atomic force microscopy (CAFM) reveal that whilst both the local and global resistive states are strongly driven by polarization direction, the type of conduction mechanism is different for each distinct thickness regime. Electrode-area dependent studies confirm the RS is dominated by an interface mechanism and not by filamentary formation. Furthermore, CAFM maps allow deconvolution of the roles played by domains and domain walls during the RS process. It is shown that the net polarization direction, and not domain walls, controls the conduction process. An interface mechanism based on barrier height and width alteration due to polarization reversal is proposed, and the role of electronic reconstruction at the interface is further investigated.</p>1 aRana, Abhimanyu1 aLu, Haidong1 aBogle, Kashinath, A.1 aZhang, Qi1 aVasudevan, Rama1 aThakare, Vishal1 aGruverman, Alexei1 aOgale, Satishchandra1 aValanoor, Nagarajan  uhttps://library.ncl.res.in/content/scaling-behavior-resistive-switching-epitaxial-bismuth-ferrite-heterostructures-0