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

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...

You might also read

Related Articles

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

Sort by

Same author

Active carbon based supercapacitors with Au colloids: the case of placing the colloids in close proximity to the electrode interface.

Nanoscale advances·2023

Same author

Laparoscopic and robotic pyeloplasty as minimally invasive alternatives to the open approach for the treatment of uretero-pelvic junction obstruction in infants: a multi-institutional comparison of outcomes and learning curves.

World journal of urology·2022

Same author

Evaluation of SMAP downscaled brightness temperature using SMAPEx-4/5 airborne observations.

Remote sensing of environment·2020

Same author

Evaluating soil moisture retrievals from ESA's SMOS and NASA's SMAP brightness temperature datasets.

Remote sensing of environment·2018

Same author

Joint Sentinel-1 and SMAP data assimilation to improve soil moisture estimates.

Geophysical research letters·2018

Same author

Estimating surface soil moisture from SMAP observations using a Neural Network technique.

Remote sensing of environment·2018

Search research articles

Related Experiment Video

Updated: Oct 28, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Optical cages made of graphitic frameworks.

J P Walker, K McDonough, H Grebel

|July 15, 2021

Summary

This summary is machine-generated.

Researchers designed graphite quasi-crystal structures for perfect infrared absorption. These structures show broad absorption across infrared and terahertz frequencies, with potential applications in energy harvesting and shielding.

More Related Videos

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Related Experiment Videos

Last Updated: Oct 28, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding

Published on: September 23, 2018

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Developing efficient infrared (IR) radiation absorbers is crucial for various technological applications.
Quasi-crystal structures offer unique electromagnetic properties not found in conventional materials.

Purpose of the Study:

To investigate the potential of graphite quasi-crystal structures as broadband infrared absorbers.
To explore the scalability of these structures for far-infrared and terahertz (THz) applications.

Main Methods:

Utilizing computational simulations to analyze arrays of subwavelength graphitic cages and cage-within-cage frameworks.
Conducting experiments with copper cages to study absorption in the microwave region.

Main Results:

Simulations revealed a flat absorption coefficient for graphite structures in the 10-30 µm IR range.
The cage-within-cage design effectively funnels IR energy, leading to enhanced absorption.
Graphitic structures demonstrated absorption capabilities extending to the microwave frequencies.

Conclusions:

Graphite quasi-crystal structures show promise for efficient absorption across a wide range of IR and THz frequencies.
The design is scalable for far-IR and THz applications, with potential uses in anti-fogging surfaces, electromagnetic shielding, and energy harvesting.