title: Positionally defined, binary semiconductor nanoparticles synthesized by scanning probe block copolymer lithography.
abstract: We report the first method for synthesizing binary semiconductor materials by scanning probe block copolymer lithography (SPBCL) in desired locations on a surface. In this work, we utilize SPBCL to create polymer features containing a desired amount of Cd(2+), which is defined by the feature volume. When they are subsequently reacted in H(2)S in the vapor phase, a single CdS nanoparticle is formed in each block copolymer (BCP) feature. The CdS nanoparticles were shown to be both crystalline and luminescent. Importantly, the CdS nanoparticle sizes can be tuned since their diameters depend on the volume of the originally deposited BCP feature.
authors.affiliation: Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
authors.forename: Louise R
authors.initials: LR
authors.lastname: Giam
authors.forename: Shu
authors.initials: S
authors.lastname: He
authors.forename: Noah E
authors.initials: NE
authors.lastname: Horwitz
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Eichelsdoerfer
authors.forename: Jinan
authors.initials: J
authors.lastname: Chai
authors.forename: Zijian
authors.initials: Z
authors.lastname: Zheng
authors.forename: Dongwoo
authors.initials: D
authors.lastname: Kim
authors.forename: Wooyoung
authors.initials: W
authors.lastname: Shim
authors.forename: Chad A
authors.initials: CA
authors.lastname: Mirkin
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D015335:Molecular Probes / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012666:Semiconductors; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D019187:Cadmium Compounds; D015335:Molecular Probes; D011108:Polymers; D013440:Sulfides; C034939:cadmium sulfide