Ground State Depletion Nanoscopy Resolves Semiconductor Nanowire Barcode Segments at Room Temperature

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Nanowires hold great promise as tools for probing and interacting with various molecular and biological systems. Their unique geometrical properties (typically <100 nm in diameter and a few micrometers in length) enable minimally invasive interactions with living cells, so that electrical signals or forces can be monitored. All such experiments require in situ high-resolution imaging to provide context. While there is a clear need to extend visualization capabilities to the nanoscale, no suitable super-resolution far-field photoluminescence microscopy of extended semiconductor emitters has been described. Here, we report that ground state depletion (GSD) nanoscopy resolves heterostructured semiconductor nanowires formed by alternating GaP/GaInP segments (“barcodes”) at a 5-fold resolution enhancement over confocal imaging. We quantify the resolution and contrast dependence on the dimensions of GaInP photoluminescence segments and illustrate the effects by imaging different nanowire barcode geometries. The far-red excitation wavelength (∼700 nm) and low excitation power (∼3 mW) make GSD nanoscopy attractive for imaging semiconductor structures in biological applications.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Max Planck Institute for Biophysical Chemistry
  • University of Warsaw
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Nanoteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)2652-2659
Antal sidor8
TidskriftNano Letters
Volym17
Utgivningsnummer4
StatusPublished - 2017 apr 12
PublikationskategoriForskning
Peer review utfördJa