Work

Aqueous phase near-infrared emitters: water transfer of colloidal 2D PbS, PbSe and PbTe nanoplatelets

Year: 2025

Type: article

Abstract: PbS: 724 nm, PbSe: 1023 nm and PbTe: 1184 nm). Water-soluble 2D PbSe shows efficient emission (up to 13% PL quantum yield at 1023 nm), thereby retaining 65% of the initial quantum yield and making it highly interesting as an aqueous NIR light source. By using X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR), we follow the phase transfer on a molecular level and find two binding motifs of MUA to the 2D PbX surfaces: X-type bound thiolate and L-type bound thiol. Our results shine new light on mercaptocarboxylic acid based nanomaterial phase transfers and represent a crucial step for incorporating NIR-emissive 2D PbX into (fiber) optics.

Source: Nanoscale

DOI: 10.1039/d5nr03504j

Authors: Leon Biesterfeld, Mattis T. Vochezer, Dominik A. Rudolph, Jannika Lauth

Institutions: Leibniz University Hannover, University of Tübingen

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, Eberhard Karls Universität Tübingen, Bundesministerium für Bildung und Forschung, Niedersächsisches Ministerium für Wissenschaft und Kultur

Awards: G263829154, EXC 2122: PhoenixD: Photonics, Optics, and Engineering – Innovation Across Disciplines, G3200601016