caa a22 4500 445303786 CHVBK 20180317142606.0 cr unu---uuuuu 170323e20100801xx s 000 0 eng 10.1007/s12274-010-0014-8 doi (NATIONALLICENCE)springer-10.1007/s12274-010-0014-8 Micro- and nanostripes of self-assembled Au nanocrystal superlattices by direct micromolding [Elektronische Daten] [Boya Radha, Giridhar Kulkarni] A simple, inexpensive direct micromolding method for patterning Au nanocrystal superlattices using a polydimethylsiloxane (PDMS) stamp has been developed. The method involves in situ synthesis of Au(I) dodecanethiolate and its decomposition leading to Au nanocrystals in the microchannels of the stamp which order themselves to form patterned superlattice stripes, in conformity with the stamp geometry. Owing to its insolubility in common solvents, the dodecanethiolate was made by reacting Au(PPh3)Cl and dodecanethiol in situ inside the microchannels, by injecting first the former solution in toluene at room temperature followed by the thiol solution at 120 °C. Annealing the reaction mixture at 250 °C, resulted in formation of nanocrystals (with a mean diameter of 7.5 nm) and hexagonal ordering. By using an external pressure while molding, parallel stripes with sub-100 nm widths were obtained. The choice of parameters such as injection temperature of the thiol and concentrations is shown to be important if an ordered superlattice is to be obtained. In addition, these parameters can be varied as a means to control the nanocrystal size. Tsinghua University Press and Springer-Verlag Berlin Heidelberg, 2010 nanolithography nationallicence soft lithography nationallicence metal nanocrystal superlattice nationallicence micromolding nationallicence direct patterning nationallicence Radha Boya Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560064, Bangalore, India aut Kulkarni Giridhar Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560064, Bangalore, India aut Nano Research Tsinghua Press 3/8(2010-08-01), 537-544 1998-0124 3:8<537 2010 3 12274 https://doi.org/10.1007/s12274-010-0014-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12274-010-0014-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Radha Boya Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560064, Bangalore, India aut NATIONALLICENCE 700 1- Kulkarni Giridhar Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560064, Bangalore, India aut NATIONALLICENCE 773 0- Nano Research Tsinghua Press 3/8(2010-08-01), 537-544 1998-0124 3:8<537 2010 3 12274 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer