English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Colloidal quantum dots (cQDs) recently emerged as building blocks forsemiconductor materials with tuneable properties. Electro-hydrodynamic printingcan be used to obtain sub-micrometre patterns of cQDs without elaborate andaggressive photolithography steps. Post-deposition ligand exchange is necessaryfor the introduction of new functionalities into cQD solids. However, achievinga complete bulk exchange is challenging and conventional infrared spectroscopylacks the required spatial resolution. Infrared nanospectroscopy (AFM-IR)enables quantitative analysis of the evolution of vibrational signals andstructural topography on the nano-metre scale upon ligand substitution on leadsulphide (PbS) cQDs. A solution of ethane-dithiol in acetonitrile demonstratedrapid (~60 s) and controllable exchange of approximately 90% of the ligands,encompassing structures up to ~800 nm in thickness. Prolonged exposures (>1 h)led to the degradation of the microstructures, with a systematic removal ofcQDs regulated by surface-to-bulk ratios and solvent interactions. This studyestablishes a method for the development of devices through a combination oftuneable photoactive materials, additive manufacturing of microstructures, andtheir quantitative nanometre-scale analysis.

AFM-IR of EHD-Printed PbS Quantum Dots: Quantifying Ligand Exchange at the Nanoscale