Optically oriented attachment of nanoscale metal-semiconductor heterostructures in organic solvents via photonic nanosoldering.

ABSTRACT: As devices approach the single-nanoparticle scale, the rational assembly of nanomaterial heterojunctions remains a persistent challenge. While optical traps can manipulate objects in three dimensions, to date, nanoscale materials have been trapped primarily in aqueous solvents or vacuum. Here, we demonstrate the use of optical traps to manipulate, align, and assemble metal-seeded nanowire building blocks in a range of organic solvents. Anisotropic radiation pressure generates an optical torque that orients each nanowire, and subsequent trapping of aligned nanowires enables deterministic fabrication of arbitrarily long heterostructures of periodically repeating bismuth-nanocrystal/germanium-nanowire junctions. Heat transport calculations, back-focal-plane interferometry, and optical images

SUBMITTER: Crane MJ 

PROVIDER: S-EPMC6821866 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature