Related Experiment Video
Updated: Apr 6, 2026

Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology
Published on: December 7, 2015
A heat flux modulator from carbon nanotubes
Shaohui Jiang1, Guang Zhang, Dan Xia
1Tsinghua-Foxconn Nanotechnology Research Center and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China. chliu@mail.tsinghua.edu.cn.
Researchers developed a novel heat flux modulator using carbon nanotube buckypaper. This device achieved a 1.41 on/off ratio, demonstrating tunable heat flux control and potential for negative heat flux, paving the way for practical micromodulators.
Area of Science:
- Materials Science
- Nanotechnology
- Thermal Engineering
Background:
- Phonons, the primary heat carriers, exhibit limited response to external fields, posing a challenge for heat flux modulation.
- Existing heat flux modulator research is predominantly theoretical, often utilizing artificial lattice structures.
Purpose of the Study:
- To experimentally demonstrate a functional heat flux modulator using ultrathin buckypaper.
- To investigate the modulation capabilities and heat transfer characteristics of the fabricated device.
- To explore the potential for practical, manufacturable micromodulators.
Main Methods:
- Fabrication of a heat modulator using multi-layer carbon nanotube sheets (buckypaper).
- Experimental setup to measure heat flux modulation using a pendent block and varying gap distances.
- Characterization of the on/off ratio and observation of heat transfer dynamics.
Main Results:
- Achieved an on/off ratio of 1.41 in the heat flux modulator without special optimizations.
- Observed tunable heat flux control by adjusting the gap between the buckypaper and the pendent gate.
- Demonstrated heat transfer to the pendent block and observed negative heat flux under specific temperature conditions.
Conclusions:
- The buckypaper-based heat modulator shows promising performance for controlling heat flux.
- The device structure, analogous to a contactless gate carbon nanotube transistor, suggests ease of future manufacturing.
- This work presents a viable experimental approach to heat flux modulation using nanomaterials.
More Related Videos
12:20Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
09:12Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
Published on: June 1, 2016
Related Concept Videos
Mechanism of heat transfer
Joule-Thomson Effect
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Biasing of Metal-Semiconductor Junctions
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
Mechanisms of Heat Transfer II
Mechanisms of Heat Transfer I