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Related Experiment Video

Updated: Oct 16, 2025

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Starch Capped Atomically Thin CuS Nanocrystals for Efficient Photothermal Therapy.

Zhiyong Zheng1, Ping Yu2, Huili Cao1

  • 1Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark.

Small (Weinheim an Der Bergstrasse, Germany)
|October 21, 2021
PubMed
Summary
This summary is machine-generated.

This study presents a rapid synthesis of ultrathin copper sulfide nanocrystals (CuS NCs) for photothermal therapy. Starch coating enhances their near-infrared absorption, leading to highly effective cancer cell killing.

Keywords:
copper sulfidesfinite element methodlocalized surface plasmon resonancesnanocrystalsphotothermal effectsphotothermal therapiesstarch

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biomedical Engineering

Background:

  • Efficient photothermal therapy relies on plasmonic nanomaterials with optimal size, dispersibility, and biocompatibility.
  • Copper sulfide nanocrystals (CuS NCs) are promising for photothermal applications due to their tunable optical properties.

Purpose of the Study:

  • To develop a rapid, one-pot synthesis for ultrathin CuS NCs with tunable size and localized surface plasmon resonance (LSPR).
  • To investigate the effect of a starch coating on the photothermal efficiency and cancer cell killing capabilities of CuS NCs.

Main Methods:

  • A one-pot, 2-minute synthesis strategy for ultrathin CuS NCs using varying precursor ratios.
  • Characterization of CuS NC size, morphology, and LSPR properties.
  • In vitro evaluation of photothermal effect and cancer cell (PC-3/Luc+) killing efficiency under near-infrared (980 nm) laser irradiation.
  • LSPR modeling to understand the role of the starch layer.

Main Results:

  • Tunable CuS NC size (4.7–28.6 nm) and LSPR (978–1200 nm) achieved by adjusting precursor ratios.
  • Starch-coated CuS NCs exhibited enhanced photothermal conversion, increasing temperature by 38.6 °C.
  • Achieved 98.4% cancer cell death with 5 mg L⁻¹ starch-coated CuS NCs and 3-minute laser treatment.
  • LSPR modeling indicated starch enhances photothermal effect by increasing free carrier density and blue-shifting LSPR.

Conclusions:

  • A highly efficient, rapid synthesis method for ultrathin, starch-coated CuS NCs was established.
  • Starch coating significantly improves the photothermal efficacy and cancer therapeutic potential of CuS NCs.
  • The findings offer insights into nanomaterial design for enhanced photothermal therapy.