Chemically programmed ultrahigh density two-dimensional semiconductor superlattice array

Narayan Pradhan, Somobrata Acharya, Katsuhiko Ariga, Niladri S. Karan, D. D. Sarma, Yoshiki Wada, Shlomo Efrima, Yuval Golan

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

(Figure Presented) Designing an ultrahigh density linear superlattice array consisting of periodic blocks of different semiconductors in the strong confinement regime via a direct synthetic route remains an unachieved challenge in nanotechnology. We report a general synthesis route for the formulation of a large-area ultrahigh density superlattice array that involves adjoining multiple units of ZnS rods by prolate CdS particles at the tips. A single one-dimensional wire is 300-500 nm long and consists of periodic quantum wells with a barrier width of 5 nm provided by ZnS and a well width of 1-2 nm provided by CdS, defining a superlattice structure. The synthesis route allows for tailoring of ultranarrow laserlike emissions (fwhm ≈ 125 meV) originating from strong interwell energy dispersion along with control of the width, pitch, and registry of the superlattice assembly. Such an exceptional high-density superlattice array could form the basis of ultrahigh density memories in addition to offering opportunities for technological advancement in conventional heterojunction-based device applications.

Original languageEnglish
Pages (from-to)1212-1213
Number of pages2
JournalJournal of the American Chemical Society
Volume132
Issue number4
DOIs
StatePublished - 3 Feb 2010

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