@article{oai:nagoya.repo.nii.ac.jp:00007100, author = {Torimoto, Tsukasa and Okazaki, Ken-ichi and Kiyama, Tomonori and Hirahara, Kaori and Tanaka, Nobuo and Kuwabata, Susumu}, issue = {24}, journal = {APPLIED PHYSICS LETTERS}, month = {Dec}, note = {Sputter deposition of gold (Au) onto ionic liquids (ILs) resulted in the formation of highly dispersed Au nanoparticles without additional chemical species, such as reducing and/or stabilizing agents. The Au nanoparticles in 1-ethyl-3-methylimidazolium tetrafluoroborate had an average diameter (dav) of 5.5 nm with a standard deviation (δ) of 0.86 nm, while sputter deposition onto N,N,N-trimethyl-N-propylammonium bis(trifluoromethanesulfonyl)imide resulted in the formation of much smaller Au nanoparticles with dav of 1.9 nm and δ of 0.46 nm. Prolongation of sputtering time results in a higher concentration of Au nanoparticles in ILs, but did not cause a remarkable change in their size.}, pages = {243117--243117}, title = {Sputter deposition onto ionic liquids : Simple and clean synthesis of highly dispersed ultrafine metal nanoparticles}, volume = {89}, year = {2006} }