01538nas a2200229   4500008004100000022001400041245007300055210006900128260007300197300001200270490000800282520072400290653001501014653002401029653002801053653003901081100002301120700002401143700001801167700001901185856010401204       2007                        eng d  a0039-602800aBlocking effects in irreversible adsorption of linear macromolecules0 aBlocking effects in irreversible adsorption of linear macromolec  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a274-2790 v6013 a<p>{A new variant of random sequential adsorption (RSA), namely random sequential ballistic adsorption (RSBA), is proposed to explore the possible role of blocking effects in the adsorption dynamics of ballistically arriving objects. These objects upon adsorption can protrude outside the substrate and in turn can obstruct and hence reject the adsorption of newly arriving objects. Adsorption of linear macromolecules (modeled as infinitesimally thin needles), on a two-dimensional continuum substrate is studied using RSBA model. It is shown analytically that in late time regime, the number n(t) of adsorbed objects at time t follows a power law n(t) similar to t(alpha), as in RSA, but with a different exponent</p>10aAdsorption10aadsorption kinetics10aMonte Carlo simulations10arandom sequential adsorption (RSA)1 aShelke, Pradip, B.1 aBanpurkar, Arun, G.1 aOgale, S., B.1 aLimaye, A., V.  uhttps://library.ncl.res.in/content/blocking-effects-irreversible-adsorption-linear-macromolecules-002573nas a2200229   4500008004100000022001400041245013200055210006900187260007300256300001400329490000800343520166100351653001502012653002402027653002802051653003902079100002302118700002402141700002902165700001902194856013002213       2007                        eng d  a0039-602800aImpact of orientational distribution of adsorbing objects on dynamics of Random Sequential Ballistic Adsorption (RSBA) dynamics0 aImpact of orientational distribution of adsorbing objects on dyn  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a5010-50150 v6013 a<p>Recently, by proposing a new variant of Random Sequential Adsorption (RSA) namely Random Sequential Ballistic Adsorption (RSBA) model [Pradip B. Shelke, A.G. Banpurkar, S.B. Ogale, A.V. Limaye, Surf. Sci. 601 (2007) 274], we addressed the issue of adsorption dynamics of extended objects where the objects, upon adsorption, protrude outside the substrate. This study brought out the role of the arriving trajectory in the adsorption dynamics. In the present work the possible role of the orientational distribution of the arriving objects in the RSBA dynamics is investigated. The dynamics of RSBA of needles (line segments) is studied analytically and by computer simulation for different types of theta distributions of arriving needles, theta being the angle made by the arriving needle with normal to the substrate. Three types of theta distributions, namely a uniform distribution over the range (0, pi/2), a Gaussian distribution and a distribution uniform over the solid angle, are considered. Analytical treatment establishes that in all the three cases, the number n(t) of adsorbed objects at a late time t follows a power law n(t) similar to t(alpha), and the exponent a depends on the specifics of the theta distribution. In general, for distribution f(theta) proportional to theta(beta), for theta -&gt; 0, alpha is found to be 2/(beta + 3). The simulation results are in excellent agreement with the analytical findings and together they reveal that the orientational distribution of arriving objects has significant consequences for the Random Sequential Ballistic Adsorption (RSBA) process. (C) 2007 Elsevier B.V. All rights reserved.</p>10aAdsorption10aadsorption kinetics10aMonte Carlo simulations10arandom sequential adsorption (RSA)1 aShelke, Pradip, B.1 aBanpurkar, Arun, G.1 aOgale, Satishchandra, B.1 aLimaye, A., V.  uhttps://library.ncl.res.in/content/impact-orientational-distribution-adsorbing-objects-dynamics-random-sequential-ballistic-002088nas a2200265   4500008004100000022001400041245015000055210006900205260009900274300001400373490000700387520109300394653002201487653001401509653001601523653003701539653001101576653000901587100001401596700001701610700002401627700002101651700001801672856013201690       2009                        eng d  a0142-961200aOn the change in bacterial size and magnetosome features for magnetospirillum magnetotacticum (MS-1) under high concentrations of zinc and nickel0 achange in bacterial size and magnetosome features for magnetospi  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcSEP  a4211-42180 v303 a<p>The characteristic size, shape and specific alignment of magnetite crystals synthesized by magnetotactic bacteria is a highly coordinated process with precise control over magnetosome vesicle formation, uptake and transport of Fe, and magnetite biomineralization. Magnetosome membranes along with some specific membrane proteins regulate crystal nucleation and morphology of magnetite. Several previous works have indicated that the morphology of mature magnetite crystals is largely unaffected by environmental conditions, though some recent studies have shown the possibility of manipulation of the biomineralization process. In this study we have examined the effects of high concentrations of Zinc and Nickel on the growth of Magnetospirillum magnetotacticum (MS-1) and the corresponding magnetosome formation. Using various characterizations it is shown that the growth of the bacterial cells, as well as the size, shape and magnetosome chain alignment is significantly influenced in the presence of high concentrations of Zn or Ni. (C) 2009 Elsevier Ltd. All rights reserved.</p>10aBiomineralization10amagnetite10aMagnetosome10aMagnetospirillum magnetotacticum10aNickel10azinc1 aKundu, S.1 aKale, A., A.1 aBanpurkar, Arun, G.1 aKulkarni, G., R.1 aOgale, S., B.  uhttps://library.ncl.res.in/content/change-bacterial-size-and-magnetosome-features-magnetospirillum-magnetotacticum-ms-1-under-001855nas a2200217   4500008004100000022001400041245007800055210006900133260008300202300001400285490000700299520103900306653003101345653003001376653003701406100002401443700002101467700002001488700002401508856010501532       2011                        eng d  a1567-173900aGrowth of aligned ZnO nanorods array on ITO for dye sensitized solar cell0 aGrowth of aligned ZnO nanorods array on ITO for dye sensitized s  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbInt Union Mat Res Soc (IUMRS)cJAN  aS113-S1160 v113 a<p>Aligned ZnO films of nanorods arrays were grown on Indium doped Tin oxide (ITO) glass substrate for the Dye Sensitized Solar Cells (DSSCs) applications. Two-step approach was employed for the deposition, which offers advantages such as excellent surface adhesion, large area deposition, high reproducibility and yield. Structural characterization using X-ray diffraction (XRD) shows a preferred c-axis (002) oriented growth. Scanning Electron Microscopy (SEM) images reveals uniformly distributed hexagonal ZnO nanorods with average diameter varying from 80 to 250 nm. Average growth rate of the films was estimated using Surface Profilometer which was found to be similar to 1 mu m/h. Optical characterizations were carried out using Photo-spectrometer and Raman spectroscopy. The DSSCs using these ZnO films of nanorods array as photo-electrodes show conversion efficiency ranging from 0.24 to -0.71 %, the maximum efficiency was obtained for films deposited for time duration 8 h. (C) 2010 Elsevier B.V. All rights reserved.</p>10aAligned ZnO nanorod growth10aDye sensitized solar cell10aOpen aqueous solution deposition1 aYengantiwar, Ashish1 aSharma, Ramakant1 aGame, Onkar, S.1 aBanpurkar, Arun, G.  uhttps://library.ncl.res.in/content/growth-aligned-zno-nanorods-array-ito-dye-sensitized-solar-cell-001555nas a2200229   4500008004100000022001400041245007200055210006700127260011000194300001400304490000600318520071600324100002001040700002101060700002001081700002401101700002401125700002001149700002401169700002901193856010301222       2011                        eng d  a2040-336400aStrong photo-response in a flip-chip nanowire p-Cu2O/n-ZnO junction0 aStrong photoresponse in a flipchip nanowire pCu2OnZnO junction  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT  a4706-47120 v33 a<p>Cu2O nanoneedles are synthesized on a copper substrate by a simple anodization and reducing ambient annealing protocol. ZnO nanorods are grown on ITO coated glass by a low temperature chemical route. The electronic and photo-response properties of the p-Cu2O/n-ZnO flip-chip heterojunction are then studied and analyzed. We show that the I-V characteristic is rectifying and the junction exhibits a good photoresponse (similar to 120% under 1 V reverse bias) under AM 1.5 (1 Sun) illumination. This nano-heterojunction photo-response is far stronger as compared to that of a pulsed laser deposited thin film p-Cu2O/n-ZnO heterojunction, which can be attributed to higher junction area in the former case.</p>1 aDeo, Meenal, S.1 aMujawar, Sarfraj1 aGame, Onkar, S.1 aYengantiwar, Ashish1 aBanpurkar, Arun, G.1 aKulkarni, Sneha1 aJog, Jyoti, Prakash1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/strong-photo-response-flip-chip-nanowire-p-cu2on-zno-junction-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-001743nas a2200181   4500008004100000022001400041245009100055210006900146260011000215300001400325490000700339520099800346100002301344700001901367700002901386700002401415856012201439       2015                        eng d  a1744-683X00aHysteretic DC electrowetting by field-induced nano-structurations on polystyrene films0 aHysteretic DC electrowetting by fieldinduced nanostructurations   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a2655-26640 v113 a<p>Electrowetting (EW) offers executive wetting control of conductive liquids on several polymer surfaces. We report a peculiar electrowetting response for aqueous drops on a polystyrene (PS) dielectric surface in the presence of silicone oil. After the first direct current (DC) voltage cycle, the droplet failed to regain Young's angle, yielding contact angle hysteresis, which is close to a value found in ambient air. We conjecture that the hysteretic EW response appears from in situ surface modification using electric field induced water-ion contact with PS surface inducing nano-structuration by electro-hydrodynamic (EHD) instability. Atomic force microscopy confirms the formation of nano-structuration on the electrowetted surface. The effects of molecular weight, applied electric field, water conductivity and pH on nano-structuration are studied. Finally, the EW based nano-structuration on PS surface is used for the enhanced loading of aqueous dyes on hydrophobic surfaces.</p>1 aSawane, Yogesh, B.1 aDatar, Suwarna1 aOgale, Satishchandra, B.1 aBanpurkar, Arun, G.  uhttps://library.ncl.res.in/content/hysteretic-dc-electrowetting-field-induced-nano-structurations-polystyrene-films-002993nas a2200241   4500008004100000022001400041245012700055210006900182260011000251300001400361490000600375520203600381100003102417700001902448700002502467700002002492700001702512700003102529700001902560700002402579700002002603856012802623       2016                        eng d  a2046-206900aSolution chemistry-based nano-structuring of copper dendrites for efficient use in catalysis and superhydrophobic surfaces0 aSolution chemistrybased nanostructuring of copper dendrites for   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a8416-84300 v63 a<p>Despite their performance and economic advantages over Ag and Au, there have been no focused research efforts on the nano-structuring of Cu dendrites with respect to fine-tuning their structure/morphology towards the efficiency enhancement of suitable applications. Reported here is a simple, versatile, environmentally-friendly and galvanic replacement reaction-based solution chemistry methodology to synthesize highly nano-structured copper dendrites targeted towards the efficiency enhancement of desired applications. Herein, copper is deposited galvanically on an Al foil in the presence of NaCl/HCl, wherein the chloride anions augment an uninterrupted replacement reaction. The growth process of Cu dendrites has been probed in detail. The presence of acid, the type of Cu2+ precursor salt, the Cu2+ ion concentration, the surfactant concentration and the reaction temperature are all demonstrated to provide useful means of modulating the surface structure/morphology of the dendrites. Notably, dendrites formed in the presence of acid are found to be highly nano-structured. Moreover, it is also found that the morphology/structure of the obtained Cu deposit depends considerably upon the choice of the Cu2+ precursor salt, a parameter that has been completely overlooked in the past. The acid-induced nano-structuring of the dendrites is exploited for enhancing their efficiency in the catalytic reduction of para-nitrophenol and for fabricating self-cleaning superhydrophobic surfaces. These nano-structured dendrites are demonstrated to have the highest ever normalized rate constant for the catalytic reduction reaction. Superhydrophobic surfaces fabricated using these dendrites demonstrate excellent self-cleaning abilities, showing a high contact angle (159 degrees) with low contact angle hysteresis (2 degrees). This facile synthetic strategy for the fabrication of highly nano-structured Cu dendrites is expected to open up avenues for the production of Cu-based low-cost functional nano/micro-materials.</p>1 aBakthavatsalam, Rangarajan1 aGhosh, Subrata1 aBiswas, Ratul, Kumar1 aSaxena, Aayushi1 aRaja, Alagar1 aThotiyl, Musthafa, Ottakam1 aWadhai, Sandip1 aBanpurkar, Arun, G.1 aKundu, Janardan  uhttps://library.ncl.res.in/content/solution-chemistry-based-nano-structuring-copper-dendrites-efficient-use-catalysis-and-002212nas a2200229   4500008004100000245008800041210006900129260000800198300001400206490000600220520141800226100001901644700002701663700003101690700002301721700002401744700002501768700002801793700002401821700002001845856011701865       2017                        eng d00aFacile synthesis and self-cleaning application of bimetallic (CuSn, CuNi) dendrites0 aFacile synthesis and selfcleaning application of bimetallic CuSn  cJUL  a5552-55630 v23 a<p>Bimetallic dendrites (Au, Ag, Pt, Pd) have received intense research interest due to their applications in catalysis and sensing. However, reports on rational synthesis of non-noble bimetallic dendrites that finds self-cleaning applications are scanty. Here, we demonstrate one step co-reduction based galvanic replacement reaction (GRR) for synthesis of alloyed bimetallic dendrites (CuSn, CuNi) with controlled surface roughness and chemical composition. Probing their growth process reveals that i) for CuSn dendrites, co-reduction of Cu2+ and Sn2+ is observed throughout GRR; ii) for CuNi dendrites, Cu nanoparticle, that deposits initially, augments the reduction of Ni2+ which leads to CuNi alloy phase formation during later stages of GRR. These dendrites, naturally having dual degree of surface roughness (micro/nano), have been exploited here for fabricating superhydrophobic surfaces (SHS) with excellent self-cleaning abilities. They show enabling properties such as high contact angle, minimal contact angle hysteresis, and excellent Cassie state stability with no impalement. They maintain superhydrophobicity when exposed to different environmental conditions (low temperature, high temperature, exposure to corroding solutions and UV radiation). The present facile methodology for fabrication of bimetallic dendrites is beneficial for low-cost production of functional nano/micro-materials.</p>1 aBiswas, Anupam1 aKulkarni, Mayuresh, A.1 aBakthavatsalam, Rangarajan1 aMondal, Sourik, K.1 aDwivedi, Pravin, K.1 aShelke, Manjusha, V.1 aDevi, Radhamonyamma, N.1 aBanpurkar, Arun, G.1 aKundu, Janardan  uhttps://library.ncl.res.in/content/facile-synthesis-and-self-cleaning-application-bimetallic-cusn-cuni-dendrites02236nas a2200265   4500008004100000022001400041245009600055210006900151260000800220300001600228490000800244520137200252653001901624653001901643653001701662653002101679653001601700100001401716700002201730700002301752700002401775700002501799700002301824856012301847       2019                        eng d  a0304-389400aNovel fatty alkene from marine bacteria: a thermo stable biosurfactant and its applications0 aNovel fatty alkene from marine bacteria a thermo stable biosurfa  cDEC  aUNSP 1208680 v3803 a<p>In this study, a novel thermo stable biosurfactants, 1-Pentanonacontene (C95H190) a fatty alkene and 3-Hydroxy16-methylheptadecanoic acid (C18H36O3) were isolated from a marine isolate SGD-AC-13. Biosurfactants were produced using 1% yeast extract in tap water as production medium at 24 h in flask and 12 h in bioreactor. Using 16S rRNA gene sequence (1515 bp) and BCL card (bioMerieux VITEK (R)), strain was identified as Bacillus sp. Crude biosurfactant reduced the surface tension of distilled water to 31.32 +/- 0.93 mN/m with CMC value of 0.3 mg/ml. Cell free supernatant showed excellent emulsification and oil displacement activity with stability up to 160 degrees C, pH 6-12 and 50 g/L NaCl conc. Biosurfactants were characterized using FTIR, TLC, HPLC LC-MS and NMR spectroscopy. Cell free supernatant reduced the contact angle of distilled water droplet from 117 degrees to 52.28 degrees and of 2% pesticide from 78.77 degrees to 73.42 degrees while 750 mu g/ml of crude biosurfactant reduced from 66.06 degrees to 56.33 degrees for 2% pesticide and recovered 35% ULO and 12% HWCO from the contaminated sand. To our best of knowledge, this is the first report of thermo stable fatty alkene as a biosurfactant and is structurally different from previously reported, with having potential application in agriculture, oil recovery and bioremediation.</p>
10aBioremediation10aBiosurfactants10aFatty alkene10aThermo stability10aWettability1 aRam, Hari1 aSahu, Amit, Kumar1 aSaid, Madhukar, S.1 aBanpurkar, Arun, G.1 aGajbhiye, Jayant, M.1 aDastager, Syed, G.  uhttps://library.ncl.res.in/content/novel-fatty-alkene-marine-bacteria-thermo-stable-biosurfactant-and-its-applications