Search research articles

Related Concept Videos

Molecular Models

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.

π Molecular Orbitals of 1,3-Butadiene

π Molecular Orbitals of 1,3-Butadiene

Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...

Circular Orbits and Critical Velocity for Satellites

Circular Orbits and Critical Velocity for Satellites

The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...

Energy of a Satellite in a Circular Orbit

Energy of a Satellite in a Circular Orbit

Thousands of artificial satellites orbit the Earth every day at various distances from the Earth. Satellites that orbit the Earth below an altitude of 1,600 km are considered to be orbiting in low-Earth orbit (LEO). Research satellites and Earth observation satellites are usually placed in LEO, and mostly orbit the Earth in elliptical orbits. Navigation satellites are placed in medium-Earth orbit (MEO), ranging from 2,000 km to 36,000 km from the surface of the Earth. Meanwhile, communication...

Reduced Mass Coordinates: Isolated Two-body Problem

Reduced Mass Coordinates: Isolated Two-body Problem

In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...

You might also read

Related Articles

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

Sort by

Same author

Isotope-Labeled Graphene Reveals the Extrinsic Origin of Raman Signatures Assigned to Graphene Edge Modes.

ACS nano·2026

Same author

Near-total Faraday rotation by the Hall effect in a 2D electron gas.

Nature communications·2026

Same author

Upconverting Nanoparticle-Loaded Microneedles for Near-Infrared Responsive Delivery of Gonadotropins to Increase Success of In Vitro Fertilization.

Small (Weinheim an der Bergstrasse, Germany)·2025

Same author

Strong and flexible graphene oxide paper for humidity responsive origami metamaterials.

Materials horizons·2025

Same author

Controlling collagen I orientation on polyetheretherketone implants to improve epithelial sealing.

ACS biomaterials science & engineering·2025

Same author

Toward Glioblastoma Treatment with High Spatiotemporal Precision: Controlling Temozolomide Release from Upconverting Nanoparticles Using Near-Infrared Light.

ACS applied materials & interfaces·2025

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

Search research articles

Related Experiment Video

Updated: Jul 3, 2026

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

Published on: February 5, 2019

Macroscopic Graphene Oxide Hollow Spheres.

Bo Wang¹, Yiwen Chen¹, Gabriele Capilli¹

¹Department of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0C5, Canada.

|August 1, 2025

Summary

Researchers created ultralight graphene oxide (GO) hollow spheres inspired by soap bubbles. These self-assembled GO spheres exhibit remarkable size ratios and can encapsulate particles, showing potential for diverse applications.

Keywords:

diameter-to-wall thickness ratio gas barrier graphene oxide hollow sphere soap bubble

More Related Videos

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Published on: July 3, 2025

Related Experiment Videos

Last Updated: Jul 3, 2026

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

Published on: February 5, 2019

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Published on: July 3, 2025

Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Graphene oxide (GO) is a 2D material with unique properties.
Hollow structures offer advantages in various applications.
Controlling self-assembly of nanomaterials is crucial for advanced materials.

Purpose of the Study:

To develop a method for creating millimeter-sized graphene oxide (GO) hollow spheres.
To investigate the self-assembly properties of GO in bubble formation.
To explore the potential applications of these GO hollow spheres.

Main Methods:

Producing GO-stabilized bubbles by blowing air into a GO and surfactant suspension.
Air-drying the bubbles to form self-supporting hollow spheres.
Encapsulating particles within the bubbles in a hydrated state.
Thermal treatment to form reduced GO (rGO) hollow spheres.
Coating rGO spheres with poly(ethylenimine)/GO shells.

Main Results:

Achieved self-supporting hollow spheres with an exceptional diameter-to-wall thickness ratio (65,000).
Obtained ultralow density spheres (0.16 mg/cm³).
Demonstrated GO self-assembly into nanometer-thin lamellar walls preventing bubble collapse.
Showcased particle encapsulation within hollow spheres.
Developed rGO hollow spheres with gas transport inhibiting shells.

Conclusions:

Millimeter-sized GO hollow spheres can be fabricated using a bubble-blowing method.
The self-assembly of GO during drying leads to stable, ultralight structures.
These GO and rGO hollow spheres have significant potential for applications due to their unique properties and tunability.