University of California, Berkeley

Berkeley Nanotechnology Lab

We grow, pattern, and build carbon nanotubes, medical diagnostics, nanoscale fabrication, energy storage, and neurally driven wearable devices.

Featured
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Detail pages
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Each project carries its own page with a working figure.

In the lab

Selected projects

Scanning electron micrograph of a carbon-nanotube forest patterned into a rectangular well

Biosensing

Carbon-nanotube biosensors for point-of-care diagnostics

A miniaturized impedance-spectroscopy platform that pairs functionalized carbon nanotubes with integrated microfluidics. Current test targets include tacrolimus and creatinine, toward monitoring for kidney failure.

Explore the biosensing project 

Four EEG channel traces on a shared two-second time axis, labelled C3, C4, Cz and Pz

Human devices

Exoskeleton

A wearable device driven by brainwave signals: body sensors, computer vision, and machine learning work together to assist motion, aimed at rehabilitation for stroke survivors.

Explore the exoskeleton project 

A lab member in cleanroom garments holding up a patterned wafer

Fabrication

Electron-beam lithography

Investigating carbon nanotubes as electron sources for lithography, with the aim of lowering the cost of nanoscale patterning.

Explore the lithography project 

Steps
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Domain
Biosensing

Figure numbers run with the schematic set.

Methods

The techniques behind the lab’s biosensing work.

  • Step 01

    Functionalization

    Carbon nanotubes are functionalized with secondary amine groups, verified by fluorescence spectroscopy.

  • Step 02

    Characterization & testing

    Electrochemical impedance spectroscopy is used to test sensor response to tacrolimus and creatinine.

  • Step 03

    Fabrication

    Microfluidic devices are designed in CAD and produced with photolithography and soft lithography.

  • Step 04

    Analysis

    Stress on carbon nanotubes is analyzed with COMSOL simulations.

Lab members in cleanroom garments working at a bench
Fabrication work at the cleanroom bench.

Leads
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Members
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Archive
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People

Our team

Portrait of Dr. Waqas Khalid

Dr. Waqas Khalid

Principal Investigator

Dr. Khalid leads the lab’s undergraduate and graduate researchers working on biosensing, fabrication, energy storage, and the exoskeleton.

waqask@berkeley.edu

Team leads

  • Portrait of Ahmed Nagi

    Ahmed Nagi

    Aerospace Engineering

  • Portrait of Marco Huang

    Marco Huang

    Bioengineering

  • Portrait of Zain Syed

    Zain Syed

    ECE

  • Portrait of Hammaad Hassan

    Hammaad Hassan

    Material Science and Engineering

  • Portrait of Jamshaid Ali

    Jamshaid Ali

    Applied Mathematics and Statistics

Current members

  • Portrait of Logan Fleming

    Logan Fleming

    EECS

  • Portrait of Aidan Lacayo

    Aidan Lacayo

    Materials Science and Engineering

  • Portrait of Mateen Mohammady

    Mateen Mohammady

  • Portrait of Eesha Sanjay

    Eesha Sanjay

  • Iffat Thasina

View full team

Papers
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Patents
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DOIs are linked only where they have been verified.

Selected publications

  • High-aspect-ratio, free-form patterning of carbon nanotube forests using micro-electro-discharge machining

    W. Khalid, M. S. M. Ali, M. Dahmardeh, Y. Choi, P. Yaghoobi, A. Nojeh, et al.

    Diamond and Related Materials, 19 (11), 1405–1410 (2010). doi:10.1016/j.diamond.2010.08.007

  • BMP10-mediated ALK1 signaling is continuously required for vascular development and maintenance

    T. L. Capasso, B. Li, H. J. Volek, W. Khalid, E. R. Rochon, A. Anbalagan, et al.

    Angiogenesis, 23, 203–220 (2020). doi:10.1007/s10456-019-09701-0

  • Parylene cantilevers integrated with polycrystalline silicon piezoresistors for surface stress sensing

    R. Katragadda, Z. Wang, W. Khalid, Y. Li, Y. Xu

    Applied Physics Letters, 91 (8) (2007). doi:10.1063/1.2772189

All publications and patents 

Lab
contact@
PI
waqask@

Contact the lab

Interested in joining the lab or working with us? Get in touch.