01999nas a2200277   4500008004100000022001400041245015700055210006900212260009500281300001400376490000600390520090200396653002901298653002601327653002101353653004201374653003501416100002501451700001801476700001501494700002801509700001701537700001601554700002201570856012901592       2006                        eng d  a1533-488000aElectrochemical organization of monolayer protected gold nanoclusters on single-walled carbon nanotubes: significantly enhanced double layer capacitance0 aElectrochemical organization of monolayer protected gold nanoclu  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScMAY  a1387-13910 v63 a<p>This paper reports a novel electrochemical route for anchoring monolayer protected gold nanoclusters (size 8 +/- 0.2 nm) on single-walled carbon nanotube bundles, resulting in the formation of hybrid materials. Monolayer protected gold nanoclusters prepared by modified Brust synthesis route were organized on SWNT bundles by cycling-the potential in dichloromethane between -1 to +1 V at a scan rate of 50 mV/s. Monolayer protected nanoclusters in electrolyte solutions possess ionic space charge around them (double layer charging), making them suitable for organization on nanotube bundles, by tuning the electrostatic interactions. More significantly, analysis of the double layer capacitance of these hybrid materials shows almost ten times increase in capacitance compared to that of bare SWNT bundles. We believe that these hybrid materials are potentially useful in nanoelectronics.</p>10adouble layer capacitance10adouble layer charging10ahybrid materials10amonolayer protected gold nanoclusters10asingle-walled carbon nanotubes1 aMahima, Subhramanyam1 aChaki, N., K.1 aSharma, J.1 aKakade, Bhalchandra, A.1 aPasricha, R.1 aRao, A., M.1 aVijayamohanan, K.  uhttps://library.ncl.res.in/content/electrochemical-organization-monolayer-protected-gold-nanoclusters-single-walled-carbon-002711nas a2200289   4500008004100000022001400041245014600055210006900201260007100270300001200341490000600353520162200359653005601981653002102037653001302058653002702071653003502098100001602133700002402149700001402173700001502187700001602202700002402218700003002242700002302272856012602295       2014                        eng d  a1936-085100aSequential electrochemical unzipping of single-walled carbon nanotubes to graphene ribbons revealed by in situ Raman spectroscopy and imaging0 aSequential electrochemical unzipping of singlewalled carbon nano  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJAN  a234-2420 v83 a<p>We report an in situ Raman spectroscopic and microscopic investigation of the electrochemical unzipping of single-walled carbon nanotubes (SWNTs). Observations of the radial breathing modes (RBMs) using Raman spectral mapping reveal that metallic SWNTs are opened up rapidly followed by gradual unzipping of semiconducting SWNTs. Consideration of the resonant Raman scattering theory suggests that two metallic SWNTs with chiralities (10,4) and (12, 0) get unzipped first at a lower electrode potential (036 V) followed by the gradual unzipping of another two metallic tubes, (9, 3) and (10, 1), at a relatively higher potential (1.16 V). The semiconducting SWNTs with chiralities (11, 7) and (12, 5), however, get open up gradually at +/- 1.66 V. A rapid decrease followed by a subsequent gradual decrease in the metallicity of the SWNT ensemble as revealed from a remarkable variation of the peak width of the G band complies well with the variations of RBM. Cyclic voltammetry also gives direct evidence for unzipping in terms of improved capacitance after oxidation followed by more important removal of oxygen functionalities during the reduction step, as reflected in subtle changes of the morphology confirming the formation of graphene nanoribbons. The density functional-based tight binding calculations show additional dependence of chirality and diameter of nanotubes on the epoxide binding energies, which is in agreement with the Raman spectroscopic results and suggests a possible mechanism of unzipping determined by combined effects of the structural characteristics of SWNTs and applied field.</p>10adensity functional-based tight binding calculations10aElectrochemistry10agraphene10aRaman spectral mapping10asingle-walled carbon nanotubes1 aJohn, Robin1 aShinde, Dhanraj, B.1 aLiu, Lili1 aDing, Feng1 aXu, Zhiping1 aVijayan, Cherianath1 aPillai, Vijayamohanan, K.1 aPradeep, Thalappil  uhttps://library.ncl.res.in/content/sequential-electrochemical-unzipping-single-walled-carbon-nanotubes-graphene-ribbons-0