02255nas a2200265 4500008004100000022001400041245013400055210006900189260009500258300001200353490000800365520121200373653002101585653002401606653003501630653001901665653002301684100002501707700002401732700002801756700002501784700002601809700003001835856012401865 2011 eng d a0003-269700aCarbon nanotube-modified sodium dodecyl sulfate-polyacrylamide gel electrophoresis for molecular weight determination of proteins0 aCarbon nanotubemodified sodium dodecyl sulfatepolyacrylamide gel a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB a230-2350 v4093 a

The effect of incorporating carbon nanotubes (CNTs) in the gel matrix on the electrophoretic mobility of proteins based on their molecular weight differences was investigated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). More specifically, a reduction in standard deviation in the molecular weight calibration plots by 55% in the case of multiwalled carbon nanotubes (MWCNTs) and by 34% in the case of single-walled carbon nanotubes (SWCNTs) compared with that of pristine polyacrylamide gels was achieved after incorporating an insignificant amount of functionalized CNTs into the gel matrix. A mechanism based on a more uniform pore size distribution in CNT modified polyacrylamide gel matrix is proposed. Furthermore, the impact of SWCNTs and MWCNTs on the mobility of proteins in different molecular weight regimes at a given acrylamide concentration offers a tunable gel matrix in terms of the selection of molecular weight ranges of proteins. The robustness and excellent reproducibility of the CNT-PAGE protocol are expected to have a significant impact on the molecular weight determination of newly isolated proteins. (C) 2010 Elsevier Inc. All rights reserved.

10aCarbon nanotubes10aGel electrophoresis10aMolecular weight determination10aPolyacrylamide10aProtein separation1 aParthasarathy, Meera1 aDebgupta, Joyashish1 aKakade, Bhalchandra, A.1 aAnsary, Abu, Ayoobul1 aKhan, Mohammad, Islam1 aPillai, Vijayamohanan, K. uhttps://library.ncl.res.in/content/carbon-nanotube-modified-sodium-dodecyl-sulfate-polyacrylamide-gel-electrophoresis-001841nas a2200169 4500008004100000022001400041245013400055210006900189260011000258300001600368490000700384520107200391100002401463700002801487700003001515856012601545 2011 eng d a1463-907600aCompetitive wetting of acetonitrile and dichloromethane in comparison to that of water on functionalized carbon nanotube surfaces0 aCompetitive wetting of acetonitrile and dichloromethane in compa aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a14668-146740 v133 a

Differential wetting of pristine and ozonized carbon nanotubes has been studied using solvents like acetonitrile and dichloromethane in comparison to the well-known wetting behavior of water. Based on their unique structural and physical properties, functionalized CNT substrates have been used due to the fact that independent variation in molecular as well as electronic properties could be controlled by understanding the wetting of these liquids on carbon nanotubes (CNTs), both pristine as well as ozone treated. The sensitivity of the wetting behavior with respect to molecular interactions has been investigated using contact angle measurements while Raman and XPS studies unravel the differential wetting behavior. Charge-transfer between adsorbed molecules and CNTs has been identified to play a crucial role in determining the interfacial energies of these two liquids, especially in the case of acetonitrile. Ozone treatment has been observed to affect the surface properties of pristine CNTs along with a concomitant change in the wetting dynamics.

1 aDebgupta, Joyashish1 aKakade, Bhalchandra, A.1 aPillai, Vijayamohanan, K. uhttps://library.ncl.res.in/content/competitive-wetting-acetonitrile-and-dichloromethane-comparison-water-functionalized-001777nas a2200181 4500008004100000022001400041245008300055210006900138260012500207300001100332490000800343520103000351100002901381700002101410700003001431700001701461856011701478 2012 eng d a0021-897900aCharge transport in functionalized multi-wall carbon nanotube-Nafion composite0 aCharge transport in functionalized multiwall carbon nanotubeNafi aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScSEP a0537060 v1123 a

The charge transport in sulfonated multi-wall carbon nanotube (sMWNT)-Nafion composite is reported. The scanning electron microscope images of the composite, at 1 and 10 wt % of sMWNT, show that the nanotubes are well dispersed in polymer matrix, with conductivity values of 0.005 and 3.2 S/cm, respectively; and the percolation threshold is nearly 0.42 wt. %. The exponent (similar to 0.25) of the temperature dependence of conductivity in both samples indicates Mott's variable range hopping (VRH) transport. The conductance in 1 wt. % sample increases by three orders of magnitude at high electric-fields, consistent with VRH model. The negative magnetoresistance in 10 wt. % sample is attributed to the forward interference scattering mechanism in VRH transport. The ac conductance in 1 wt. % sample is expressed by sigma(omega) proportional to omega(s), and the temperature dependence of s follows the correlated barrier hopping model. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749264]

1 aSangeeth, C., S. Suchand1 aKannan, Ramaiyan1 aPillai, Vijayamohanan, K.1 aMenon, Reghu uhttps://library.ncl.res.in/content/charge-transport-functionalized-multi-wall-carbon-nanotube-nafion-composite-001741nas a2200169 4500008004100000022001400041245014100055210006900196260009000265300002300355490000600378520098900384100002401373700002101397700003001418856012301448 2014 eng d a2045-232200aCounter-ion dependent, longitudinal unzipping of multi-walled carbon nanotubes to highly conductive and transparent graphene nanoribbons0 aCounterion dependent longitudinal unzipping of multiwalled carbo aMACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLANDbNATURE PUBLISHING GROUPcMAR aArticle No. : 43630 v43 a

Here we report for the first time, a simple hydrothermal approach for the bulk production of highly conductive and transparent graphene nanoribbons (GNRs) using several counter ions from K2SO4, KNO3, KOH and H2SO4 in aqueous media, where, selective intercalation followed by exfoliation gives highly conducting GNRs with over 80% yield. In these experiments, sulfate and nitrate ions act as a co-intercalant along with potassium ions resulting into exfoliation of multi-walled carbon nanotubes (MWCNTs) in an effective manner. The striking similarity of experimental results in KOH and H2SO4 that demonstrates partially damaged MWCNTs, implies that no individual K+, SO42- ion plays a key role in unwrapping of MWCNTs, rather this process is largely effective in the presence of both cations and anions working in a cooperative manner. The GNRs can be used for preparing conductive 16 k Omega sq(-1), transparent (82%) and flexible thin films using low cost fabrication method.

1 aShinde, Dhanraj, B.1 aMajumder, Mainak1 aPillai, Vijayamohanan, K. uhttps://library.ncl.res.in/content/counter-ion-dependent-longitudinal-unzipping-multi-walled-carbon-nanotubes-highly-001861nas a2200181 4500008004100000022001400041245013300055210006900188260009000257300000900347490000600356520108400362100002901446700002401475700003001499700002501529856012501554 2014 eng d a2045-232200aC@SiNW/TiO2 core-shell nanoarrays with sandwiched carbon passivation layer as high efficiency photoelectrode for water splitting0 aCSiNWTiO2 coreshell nanoarrays with sandwiched carbon passivatio aMACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLANDbNATURE PUBLISHING GROUPcMAY a48970 v43 a

One-dimensional heterostructure nanoarrays are efficiently promising as high performance electrodes for photo electrochemical (PEC) water splitting applications, wherein it is highly desirable for the electrode to have a broad light absorption, efficient charge separation and redox properties as well as defect free surface with high area suitable for fast interfacial charge transfer. We present highly active and unique photoelectrode for solar H-2 production, consisting of silicon nanowires (SiNWs)/TiO2 core-shell structures. SiNWs are passivated to reduce defect sites and protected against oxidation in air or water by forming very thin carbon layer sandwiched between SiNW and TiO2 surfaces. This carbon layer decreases recombination rates and also enhances the interfacial charge transfer between the silicon and TiO2. A systematic investigation of the role of SiNW length and TiO2 thickness on photocurrent reveals enhanced photocurrent density up to 5.97 mA/cm(2) at 1.0 V vs. NHE by using C@SiNW/TiO2 nanoarrays with photo electrochemical efficiency of 1.17%.

1 aDevarapalli, Rami, Reddy1 aDebgupta, Joyashish1 aPillai, Vijayamohanan, K.1 aShelke, Manjusha, V. uhttps://library.ncl.res.in/content/csinwtio2-core-shell-nanoarrays-sandwiched-carbon-passivation-layer-high-efficiency-000694nas a2200169 4500008004100000022001400041245009600055210006900151260005700220300001200277490000600289100002400295700002400319700003000343700002500373856012600398 2015 eng d a1868-252900aCo3O4 nanorods-efficient non-noble metal electrocatalyst for oxygen evolution at neutral pH0 aCo3O4 nanorodsefficient nonnoble metal electrocatalyst for oxyge a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcJUL a331-3400 v61 aRamsundar, Rani, M.1 aDebgupta, Joyashish1 aPillai, Vijayamohanan, K.1 aJoy, Pattayil, Alias uhttps://library.ncl.res.in/content/co3o4-nanorods-efficient-non-noble-metal-electrocatalyst-oxygen-evolution-neutral-ph-0