Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Cluster Sampling Method

Cluster Sampling Method

Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Non-equilibrium correlated electron dynamics in triangular molecular assemblies.

Nature communications·2026

Same author

Higher odd-order nonlinear Hall effect in magnetic topological insulator Mn(Bi<sub>1-x</sub>Sb<sub>x</sub>)<sub>2</sub>Te<sub>4</sub>.

Nature communications·2026

Same author

A Sc<sub>2</sub>C<sub>2</sub>@C<sub>88</sub>-cluster-based ultra-compact multilevel probabilistic bit for matrix multiplication.

Nature materials·2026

Same author

Magnetic properties of molecules on surfaces studied with scanning probe methods.

National science review·2026

Same author

Unconventional spin-intertwined charge density wave in magnetic phases of kagome metal GdTi<sub>3</sub>Bi<sub>4</sub>.

Nature communications·2026

Same author

Large-area non-stoichiometric phase transition in transition metal chalcogenide films.

Nature materials·2026

Search research articles

Related Experiment Video

Updated: Jul 8, 2026

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Published on: November 27, 2013

Beam generation and structural optimization of size-selected Au₉₂₃ clusters.

Siqi Lu^1,2, Kuojuei Hu^1,2, Zewen Zuo^1,2

¹National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 China songfengqi@nju.edu.cn caolu@nju.edu.cn.

Nanoscale Advances

|September 22, 2022

Summary

Researchers studied gold nanoparticles (Au_923±20) and found that non-bulk structures dominate. Controlling beam conditions allows optimization of these nanoparticle structures for advanced applications.

More Related Videos

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

Published on: June 27, 2022

Related Experiment Videos

Last Updated: Jul 8, 2026

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Published on: November 27, 2013

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

Sample Preparation and Experimental Design for In Situ Multi-Beam Transmission Electron Microscopy Irradiation Experiments

Published on: June 27, 2022

Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Gold nanoparticles exhibit unique properties dependent on their size and structure.
Understanding the structural preferences of medium-sized gold clusters is crucial for their application.

Purpose of the Study:

To investigate the structural characteristics of size-selected gold clusters (Au_923±20).
To determine the prevalence of different metastable structures in these clusters.
To explore methods for controlling nanoparticle structure.

Main Methods:

Generation of size-selected Au_923±20 clusters using a gas-phase condensation source and time-of-flight mass selector.
Analysis of cluster structures using scanning transmission electron microscopy (STEM).

Main Results:

Four types of metastable structures were identified: icosahedron (Ih), cuboctahedron (face-centered cubic - Fcc), and two forms of decahedron (Dh).
The bulk-favored cuboctahedron (Fcc) structure constituted only 10-20% of the observed clusters.
Penta-rotating symmetrical structures, specifically decahedron (Dh) and icosahedron (Ih), were dominant, comprising over 75% of the clusters.
Beam conditions influenced the ratio of Dh to Ih structures.

Conclusions:

Medium-sized gold clusters predominantly adopt non-bulk, symmetrical structures.
The structural outcome can be tuned by adjusting experimental parameters, offering a pathway for controlled nanoparticle synthesis.
This control over nanoparticle structure opens possibilities for advanced applications beyond simple size-based properties.