02032nas a2200265   4500008004100000022001400041245008000055210006900135260007300204300001200277490000800289520112700297653003401424653002601458653002201484653002401506100001401530700002101544700002201565700001601587700002001603700001201623700001701635856011401652       2005                        eng d  a0040-603100aPhase transitions in octanethiol-capped Ag nanocluster microfilm assemblies0 aPhase transitions in octanethiolcapped Ag nanocluster microfilm   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a207-2120 v4263 a<p>We describe phase transitions in microfilm assemblies of octanethiol (OT)-capped 2-4 nm-diameter Ag nanoclusters prepared from solutions with OT/Ag+ ratios of similar to50. Using DSC we observe two melting/crystallization-type reversible phase transitions: one at similar to61 degreesC due to interdigiated unattached octanethiol, and the other at similar to125 degreesC due to the phase comprised of the assembly of OT-capped nanoclusters. Increased thermal fluctuations weaken the inter-chain hydrophobic interactions between interdigitated OT molecules, leading to both phase transitions. The thiolate bond of OT-molecules bound to Ag nanoclusters are more rigid, thereby requiring a higher temperature to increase the flexibility of the alkyl chain of OT, and to melt the nanocluster assembly. The mobility of the nanoclusters in the melt is limited, and morphological features of the original assemblies are retained during recrystallization. No observable mass loss is detected up to similar to180 degreesC, above which OT molecules desorb from the Ag nanoclusters. (C) 2004 Elsevier B.V. All rights reserved.</p>10adifferential thermal analysis10ainfrared spectroscopy10aphase transitions10asilver nanoclusters1 aEllis, A.1 aD'Arcy-Galla, J.1 aVijayamohanan, K.1 aGoswami, R.1 aGanesan, P., G.1 aRyu, C.1 aRamanath, G.  uhttps://library.ncl.res.in/content/phase-transitions-octanethiol-capped-ag-nanocluster-microfilm-assemblies-001274nas a2200193   4500008004100000022001400041245007700055210006900132260011000201300001400311520052900325100002400854700001600878700002100894700002000915700002200935700001700957856010600974       2005                        eng d  a1359-734500aWet-chemical templateless assembly of metal nanowires from nanoparticles0 aWetchemical templateless assembly of metal nanowires from nanopa  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a1435-14373 a<p>We describe a new, simple, room-temperature wet-chemical approach for assembling Au and Ag nanoparticles into nanowire networks, without the use of lithographic templates. Five to 35 nm-diameter nanowires passivated with a thin organic layer were synthesized by mechanically agitating a biphasic liquid mixture of an aqueous hydrosol containing the nanoparticles, and toluene. Nanowire structure and surface chemistry are discussed based on electron microscopy, UV-visible spectroscopy and thermogravimetric analyses.</p>1 aMaddanimath, Trupti1 aKumar, Anil1 aD'Arcy-Galla, J.1 aGanesan, P., G.1 aVijayamohanan, K.1 aRamanath, G.  uhttps://library.ncl.res.in/content/wet-chemical-templateless-assembly-metal-nanowires-nanoparticles-0