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Related Concept Videos

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
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Spatial and temporal control over photoresponsive nanoclusters.

Ying Xu1, Mengfan Chang1, Hao Li2

  • 1Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, China.

National Science Review
|February 19, 2026
PubMed
Summary

Researchers developed a photochemical method for controlling nanocluster transformations in solid states. This approach enhances photoresponsive materials by enabling precise spatial and temporal control over cluster size and structure.

Keywords:
alloying effectatomically precise nanoclustersphotoinduced conversionsolid-state transformationspatial controltemporal control

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Area of Science:

  • Materials Science
  • Photochemistry
  • Nanotechnology

Background:

  • Metal nanoclusters exhibit efficient photoresponsive transformations in solution.
  • Solid-state nanocluster materials show limited responsiveness due to restricted motional freedom.

Purpose of the Study:

  • To present a photochemical approach for controlled nanocluster structure/size conversions in the crystalline state.
  • To investigate the photoinduced transformation of Cu18 and Ag1Cu17 nanoclusters.

Main Methods:

  • Utilized 365-nm light for photoinduced transformations.
  • Employed time-dependent characterizations to monitor conversion efficiencies.
  • Applied theoretical calculations to rationalize experimental observations.
  • Investigated spatial and temporal control using femtosecond laser technology and UV irradiation time.

Main Results:

  • Cu18 nanoclusters transform to Cu14 upon 365-nm light exposure in both solution and solid states.
  • The Ag1Cu17 single-atom alloy shows enhanced efficiency for the same photoinduced conversion.
  • Comparable photoinduced conversion efficiencies were observed between Cu18 and Ag1Cu17.
  • Achieved precise spatial and temporal control of solid-state transformations at the micrometer scale.

Conclusions:

  • The study introduces a novel pair of clusters with comparable photoinduced conversion characteristics.
  • Provides an in-depth understanding of the photochemical behavior of metal nanoclusters in the solid state.
  • Findings are expected to facilitate the design of cluster-based solid-state nanomaterials for photoresponsive applications.