Ali Javey (Advisor)

Research Advised by Professor Ali Javey

Javey Group:  List of Projects | List of Researchers

Micro Chemical Vapor Deposition for the Synthesis of Nanomaterials

Qin Zhou
Liwei Lin
Albert P. Pisano
Ali Javey
2011

MEMS (Microelectromechanical Systems) technologies have enabled the construction of a micro chemical vapor deposition (μCVD) system for the synthesis of nanomaterials. By means of localized resistive heating via micro-heaters, unique capabilities of the μCVD systems have been utilized to synthesize carbon nanotubes and graphene in this work, including fast stabilization of temperature; rapid exchange of gas species; laminar gas flow due to small Reynolds number; small...

Monolayer Transition Metal Dichalcogenide NanoLEDs: Towards High Speed and High Efficiency

Kevin Han
Ming C. Wu
Ali Javey
Feng Wang
2019
On-chip optical interconnects promise to drastically reduce energy consumption compared to electrical interconnects, which dominate power dissipation in modern integrated circuits (ICs)One key requirement is a low-power, high-efficiency, and high-speed nanoscale light source. However, existing III-V semiconductor light sources face a high surface recombination velocity (SRV ~ 10...

Materials Science and Device Physics of 2-Dimensional Semiconductors

Hui Fang
Ali Javey
Ramamoorthy Ramesh
Junqiao Wu
Eli Yablonovitch
2014

Materials and device innovations are the keys to future technology revolution. For MOSFET scaling in particular, semiconductors with ultra-thin thickness on insulator platform is currently of great interest, due to the potential of integrating excellent channel materials with the industrially mature Si processing. Meanwhile, ultra-thin thickness also induces strong quantum confinement which in turn affect most of the material properties of these 2-dimensional (2-D) semiconductors, providing...

Fabrication and Characterization of Gecko-inspired Fibrillar Adhesive

Yongkwan Kim
Roya Maboudian
David B. Graves
Ali Javey
2014
Over the last decade, geckos remarkable ability to stick to and climb surfaces found in nature has motivated a wide range of scientific interest in engineering gecko-mimetic surface for various adhesive and high friction applications. The high adhesion and friction of its pads have been attributed to a complex array of hairy structures, which maximize surface area for van der Waals interaction between the toes and the count...

Electrochemical Approaches to Renewable Energy

Peter Lobaccaro
Joel Ager
Roya Maboudian
Alexis Bell
Ali Javey
2016
Renewable energy is becoming an increasingly important component of the world’s energy supply as the threat of global warming continues to rise. There is a need to reduce the cost of this renewable energy and a future challenge to deal with the strain intermittent power sources like renewables place on the power grid. In this dissertation, electrochemistry is harnessed to address possible solutions to both of these issues. First, it is used to develop a low...

Design of Nano-Materials For High Performance Electronic and Sensory Applications

Johnny Chung Yin Ho
Yuri Suzuki
Oscar Dubon
Ali Javey
2009
Device scaling has been one of the main driving forces for technology advancement in the semiconductor industry over last few decades. As this scaling continues into the future, serious fundamental and technological issues will arise as a result of the limitations of conventional device fabrication and materials, etc. Among these many challenges, in particular, there is a tremendous need for new processing technologies to control atomic composition in semiconductor structures as well as the application of new...

Mallika Bariya

Alumni
Electrical Engineering and Computer Sciences
Professor Ali Javey (Advisor)
Ph.D. 2021

Mallika joined Prof. Ali Javey’s group as a PhD student and NSF Graduate Research Fellow in 2016. Her research is focused on electrochemical sensing technologies for healthcare applications, with particular emphasis on developing and using sweat sensors to understand how non-invasive parameters can reflect deeper physiology.

A Wearable Nutrition Tracker.

Jiangqi Zhao
Hnin Yin Yin Nyein
Lei Hou
Yuanjing Lin
Mallika Bariya
Christine Heera Ahn
Wenbo Ji
Zhiyong Fan
Ali Javey
2020

Nutrients are essential for the healthy development and proper maintenance of body functions in humans. For adequate nourishment, it is important to keep track of nutrients level in the body, apart from consuming sufficient nutrition that is in line with dietary guidelines. Sweat, which contains rich chemical information, is an attractive biofluid for routine non-invasive assessment of nutrient levels. Herein, a wearable sensor that can selectively measure vitamin C concentration in biofluids, including sweat, urine, and blood is developed. Detection through an electrochemical sensor...

Two-Dimensional Semiconductor Optoelectronics

Matin Amani
2021

A fundamental figure of merit for high performance optoelectronic devices is their photoluminescence (PL) quantum yield (QY). This value, which accounts for the fraction of absorbed photons are re-emitted by the material governs the ultimate performance of optoelectronic devices such as light emitting diodes, photodetectors/photovoltaics, and solar cells. Two-dimensional (2D) semiconductors have emerged as a promising material system for high-performance optoelectronic and electronic applications. This class of materials possess out-of-plane van der Waals bonding, and as a result has...

Dynamic Spectrum Optoelectronics with Black Phosphorus

Hyungjin Kim
2021
Spring 2021 BSAC Research Review Presentation View Slides View Presentation