01688nas a2200253   4500008004100000022001400041245009500055210006900150260010200219300001200321490000800333520076300341653002101104653001501125653001401140653001901154653002401173100002801197700001801225700001901243700002001262700002601282856012601308       2008                        eng d  a0253-413400aNear-complete phase transfer of single-wall carbon nanotubes by covalent functionalization0 aNearcomplete phase transfer of singlewall carbon nanotubes by co  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScNOV  a599-6060 v1203 a<p>We describe here an efficient phase transfer of single wall carbon nanotubes (SWNTs) from aqueous to non-aqueous media using a unique amide functionalization route, where water soluble SWNTs (2.6 mg/mL) are effectively transferred to solvents like chloroform, toluene and CS(2). A maximum of 30 wt% of oxygenated groups have been generated on the side walls by rapid microwave treatment, leading to a solubility of more than 2.6 mg/mL in water. Approximate surface amine coverage of 50% has been accomplished after oxalyl chloride treatment as inferred from thermogravimetry and X-ray photoelectron spectroscopy by controlling several key parameters associated with the extent of functionalization including purity of the sample, temperature and time.</p>10aCarbon nanotubes10amicroscopy10aMicrowave10aNanostructures10asolubility of SWNTs1 aKakade, Bhalchandra, A.1 aPatil, Sanjay1 aSathe, Bhaskar1 aGokhale, Suresh1 aPillai, Vijayamohanan  uhttps://library.ncl.res.in/content/near-complete-phase-transfer-single-wall-carbon-nanotubes-covalent-functionalization-001246nas a2200181   4500008004100000022001400041245011600055210006900171260008400240300001200324490000700336520051600343100001800859700001900877700001700896700002000913856013100933       2012                        eng d  a0366-702200aCVD synthesis of highly graphitized single-walled carbon nanotubes using nitrogen-pretreated Fe-Mo/MgO catalyst0 aCVD synthesis of highly graphitized singlewalled carbon nanotube  a1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPANbCHEMICAL SOC JAPANcSEP  a871-8730 v413 a<p>Single-walled carbon nanotubes (SWNTs) with highly graphitized structure were synthesized by thermal chemical vapor deposition using an improved nitrogen-pretreated Fe-Mo/MgO catalyst. The effects of nitrogen pretreatment of Fe-Mo/MgO on the structure and properties of SWNTs were studied by TEM, Raman spectroscopy, and TGA. The investigations revealed that the nitrogen pretreatment of the catalyst promoted the growth of SWNTs. It also enhanced the structural features and thermal properties of SWNTs.</p>1 aPatil, Gaurav1 aSarode, Chetan1 aPatil, Rahul1 aGokhale, Suresh  uhttps://library.ncl.res.in/content/cvd-synthesis-highly-graphitized-single-walled-carbon-nanotubes-using-nitrogen-pretreated-001530nas a2200205   4500008004100000022001400041245005600055210005600111260010500167300001200272490000700284520083400291653001301125653002001138653001701158100002201175700002001197700002001217856008701237       2014                        eng d  a2083-133100aCVD synthesis of graphene nanoplates on MgO support0 aCVD synthesis of graphene nanoplates on MgO support  aWYBRZEZE WYSPIANSKIEGO 27, 50-370 WROCLAW, POLANDbOFICYNA WYDAWNICZA POLITECHNIKI WROCLAWSKIEJcJUN  a243-2460 v323 a<p>Synthesis of graphene directly on MgO has been carried out and the structural properties of the obtained material have been investigated. Few-layered graphene was produced by simple thermal decomposition of methane over MgO powder at 950 A degrees C in a CVD reactor. The samples were purified by 10 N HNO3 treatment, and studied by TEM, Raman spectroscopy, EDAX and SEM. TEM clearly indicated the formation of graphene. EDAX showed that the purified sample contained only carbon and no traces of MgO. The characteristic Raman features of graphene were also seen as D-band at 1316 cm(-1), G-band at 1602 cm(-1), and a small 2D-band at 2700 cm(-1) in the Raman spectra. The strong D-band suggests that the graphene possess large number of boundary defects. The small 2D-band indicates the formation of few-layered graphene.</p>10agraphene10amagnesium oxide10ananographene1 aJugade, Ravin, M.1 aSharma, Shalini1 aGokhale, Suresh  uhttps://library.ncl.res.in/content/cvd-synthesis-graphene-nanoplates-mgo-support-002098nas a2200265   4500008004100000022001400041245012000055210006900175260005700244300001400301490000700315520117600322653002401498653000901522653001901531653002201550653001601572653001801588100002001606700002301626700001901649700002001668700001901688856012501707       2015                        eng d  a0361-523500aLow-temperature sintering and microwave dielectric properties of Zn2SiO4 ceramic added with crystalline zinc borate0 aLowtemperature sintering and microwave dielectric properties of   a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcJUL  a2312-23200 v443 a<p>The physical and dielectric properties of composites of known microwave materials, Zn2SiO4 and Zn3B2O6, prepared by solid-state reaction, were investigated with the purpose of developing a low-loss dielectric material for low-temperature co-fired ceramic applications. An off-stoichiometric phase of Zn2SiO4 with extra SiO2 was used to avoid the occurrence of unreacted ZnO. During sintering, zinc borate was found to partially react with residual SiO2 to form Zn2SiO4. The residual zinc borate was converted to a boron-rich glassy phase which helped to reduce the sintering temperature of the composite. Good relative sintering density (&gt; 90%) at temperatures below the melting temperature of zinc borate is indicative of a sintering mechanism of diffusion-based mass transfer. Composites containing 15 wt.% zinc borate, 2.5 wt.% lithium carbonate and 20 wt.% zinc borate in zinc silicate had dielectric constants of 6.8 and 6.1, quality factors (Qxf) of 48,800 and 94,300 GHz when sintered at 900A degrees C and 950A degrees C, respectively. These quality factor results are close to the best values reported for zinc silicate at these sintering temperatures.</p>10adielectric constant10aLTCC10aquality factor10asintering density10azinc borate10azinc silicate1 aChaware, Varsha1 aDeshmukh, Ravindra1 aSarode, Chetan1 aGokhale, Suresh1 aPhatak, Girish  uhttps://library.ncl.res.in/content/low-temperature-sintering-and-microwave-dielectric-properties-zn2sio4-ceramic-added-001669nas a2200181   4500008004100000245013900041210006900180260000800249300001600257490000700273520096400280100001701244700001801261700002201279700002001301700003801321856012801359       2016                        eng d00aLaser shielding and thermal ablation characteristics of resorcinol formaldehyde/boronnitride composites for thermal protection systems0 aLaser shielding and thermal ablation characteristics of resorcin  cOCT  a10645-106550 v553 aResorcinol formaldehyde (RF) composites were modified by incorporating different weight ratios of hexagonal boron nitride (h-BN) through a novel in situ polymerization technique. Temperature modulated SAXS was used to understand the changes in polymer network due to h-BN addition. The ablation performance of RF BN composites was evaluated by pulsed laser and oxyacetylene torch tests. Linear ablation resistance under oxyacetylene conditions improved by 18%. Laser ablation resistance increased by 44%. The reasons for improved ablation resistance for RF BN composites were studied using XRD, FTIR, and XPS methods which indicated that h-BN undergoes phase transformation at higher temperatures and also displays typical floral assimilation leading to significant energy consumption. This results in improved ablation resistance. These findings could lead to fabrication of RF BN based thermal protection systems (TPS) having better protection capabilities.1 aDaniel, Alex1 aBadhe, Yutika1 aSrikanth, Ivaturi1 aGokhale, Suresh1 aBalasubramanian, Kandasubramanian  uhttps://library.ncl.res.in/content/laser-shielding-and-thermal-ablation-characteristics-resorcinol-formaldehydeboronnitride02207nas a2200265   4500008004100000022001400041245011500055210006900170260000800239300000800247490000800255520135400263653001801617653002201635653001901657653002101676653001601697653001301713100001701726700001701743700002101760700001701781700002001798856012301818       2020                        eng d  a0947-839600aSunlight assisted improved photocatalytic degradation of rhodamine B using Pd-loaded g-C3N4/WO(3)nanocomposite0 aSunlight assisted improved photocatalytic degradation of rhodami  cAUG  a7240 v1263 a<p>Effective photocatalytic degradation of organic toxic dyes from industrial effluents using low-cost nanomaterials as a photocatalyst under sunlight promises for water purification and environmental recovery. The present work is focused on the synthesis of Palladium (Pd) loaded g-C3N4/WO(3)nanocomposite using a facile method and its photocatalytic degradation of Rhodamine B (RhB) using under sunlight. The results of the photocatalytic dye degradation experiment show that Pd loaded g-C3N4/WO(3)nanocomposite photocatalyst degrades 98% of RhB in 40 min of sunlight illumination. This remarkable photocatalytic degradation performance of Pd loaded g-C3N4/WO(3)nanocomposite mainly attributed due to their intrinsic photocatalytic activity and co-existence of enhanced light absorbance and efficient charge transfer process in between the g-C3N4/WO(3)heterojunction. The durability testing experiments indicate that Pd loaded g-C3N4/WO(3)nanocomposite photocatalyst could be effectively reused and possesses high photochemical structural stability even after several recycle process. Present experimental results demonstrated highly encouraging photo-degradation response of Pd loaded g-C3N4/WO(3)nanocomposite photocatalyst at outdoor conditions paves the way for the development of energy conversion and environmental remediation process.</p>
10aNanocomposite10aPalladium loading10aPhotocatalysis10aPhotodegradation10aRhodamine B10aSunlight1 aAlman, Vidya1 aSingh, Kirti1 aBhat, Tejasvinee1 aSheikh, Arif1 aGokhale, Suresh  uhttps://library.ncl.res.in/content/sunlight-assisted-improved-photocatalytic-degradation-rhodamine-b-using-pd-loaded-g01751nas a2200313   4500008004100000022001400041245006800055210006800123260000800191300001000199490000700209520080600216653002001022653002601042653003801068653002101106100002001127700001901147700001601166700001901182700002001201700001701221700002501238700002001263700002001283700001801303700001601321856010001337       2021                        eng d  a1580-294900aMechanical properties of anodic titanium dioxide nanostructures0 aMechanical properties of anodic titanium dioxide nanostructures  cJAN  a19-240 v553 a<p>Highly ordered and uniform titanium dioxide (TiO2) nanotubes (NTs) with different morphologies (15 nm, 50 nm and 100 nm in diameter) were prepared by the electrochemical anodization of Ti substrates. The TiO2 NTs' surface properties were characterized by X-ray diffraction (XRD) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM). The elastic modulus (E) and the Vickers hardness (HV) of the Ti foil and of the different-morphology TiO2 NTs were evaluated with the nano-indentation technique. E and HV increase with the decreasing length/diameter of the NTs, meaning that NTs with smaller diameters are more resistant to mechanical wear. The elastic modulus of the TiO2 NTs with 15-nm and 50-nm diameters is similar to that of the human bone.</p>10aElastic modulus10amechanical properties10atitanium dioxide (TiO2) nanotubes10aVickers hardness1 aKulkarni, Mukta1 aSepitka, Josef1 aJunkar, Ita1 aBencina, Metka1 aRawat, Niharika1 aMazare, Anca1 aRode, Chandrashekhar1 aGokhale, Suresh1 aSchmuki, Patrik1 aDaniel, Matej1 aIglic, Ales  uhttps://library.ncl.res.in/content/mechanical-properties-anodic-titanium-dioxide-nanostructures