Liwei Lin (Advisor)

Research Advised by Professor Liwei Lin

Lin Group:  List of Projects | List of Researchers

BPN772: Graphene for Room Temperature Gas Sensors

Takeshi Hayasaka
Zhichun Shao
Vijay Kumar
Ritu Malik
2019

As air pollution from industrial and automobile emissions becomes more and more severe, a personalized, integrated, gas sensor is desirable for everyone to monitor everyday air quality, as well as their personal health condition noninvasively. Such sensors should have desirable features like energy efficiency, miniature size, accurate response (down to ppm level), and selectivity. Traditional bulk MOX-based gas sensors work in the temperature range of 300C to 400C,...

BPN860: Laser Printed Carbide-Graphene for Paper Electronics

Yu Long
Minsong Wei
Renxiao Xu
Junwen Zhong
Peisheng He
Fanping Sui
2019

Paper electronics have attracted researchers’ attention in recent years for its potential advantage of disposability, foldability, low density and low cost. In our previous studies, we have shown a drastically different approach by a direct-write laser patterning process on paper to realize various basic device applications, such as a foldable triboelectricity generator and a folded supercapacitor as the potential paper-based power source for paper electronics, a wireless...

Textile Supercapacitor for Wearable Energy Storage

Dongwoo Shin
Liwei Lin
Samuel Mao
2018
In today’s world, portable electronics are an integral part of our lives. For example, with a mobile phone, we wake up in the morning, read the news, communicate, send and receive emails, listen to music, diagnose health issues and capture important fleeting moments in photos and videos. We no longer carry heavy stacks of documents and books but hold on to our laptop and wear an electronic watch not merely to know the time, but to monitor and record our health in realtime even while...

Toward A Levitated Micromechanical Resonator

Ilya Gurin
Clark T.-C. Nguyen
Liwei Lin
2010

Capacitive micromechanical (MEMS) resonators promise to dramatically improve the design of RF frontends for wireless communications by virtue of their high quality factor (Q). Unfortunately, the physical limitations of MEMS resonators’ Q are poorly understood, and the highest Qs have proven difficult to achieve reliably. In order to further...

Sensing and Harvesting Pressure Fluctuations in Harsh Environments

Levent Beker
Liwei Lin
Albert P. Pisano
Tarek Zohdi
Rikky Muller
2017

Pressure is one of the most frequent and important parameters utilized in many applications to provide critical information about the operation of a system as well as a potential mechanical energy source. Among various pressure-related devices, very few function in harsh environment which includes high temperature, high pressure...

Stability, Sensitivity, and Selectivity of Graphene FET-based Gas Sensors

Takeshi Hayasaka
Liwei Lin
Dorian Liepmann
Ana Claudia Arias
2019
Miniaturized gas sensors are expected to witness a high demand in the next decade invarious industry fields due to the small foot print, low power consumption, and low manufacturing cost. To date, various miniaturized gas sensors have been proposed by combining key sensing principles/materials and micro/nano fabrication technologies. Among those platforms, graphene-based gas sensor is especially promising due the unique features: gas sensing capability at room temperature, unique electrical properties, and the truly two...

Silicon and Silicon Carbide Nanowires: Synthesis, Characterization, Modification, and Application as Micro-Supercapacitor Electrodes

John Paul Alper
Roya Maboudian
David B. Graves
Liwei Lin
2014
For applications in mobile and remote sensing platforms, microsupercapacitors are attractive energy storage devices due to their robust lifetimes and high specific power capacity. Utilization of green electrolytes in these devices reduces environmental impact and simplifies packaging by avoiding the stringent oxygen and moisture free conditions required for organic and ionic liquid based electrolytes. Porous silicon...

Silicon to Steel, Rapid Bonding

Theodore Prescop
Albert P. Pisano
Liwei Lin
2003

A rapid bonding process for installing vacuum-sealed MEMS strain sensor modules to mechanical components is being developed. This innovative process will be developed to replace conventional adhesive-based approaches. In particular, the silicon to ...

Resonant Circuits for MEMS Interfaces

Baris Cagdaser
Bernhard E. Boser
Kristofer S.J. Pister
Liwei Lin
Roger T. Howe
2005
This work describes the use of resonant circuits for electrostatic actuation of MEMS devices with low voltage drive electronics. Resonant drive also offers a solution for position sensing and generates a sense signal without the need for a separate sense capacitor. Moreover, an inherent force feedback mechanism limits the drive voltage as the drive capacitor becomes larger and stabilizes parallel-plate actuators beyond the pull-in point of the...

Rapid Synthesis of One-Dimensional Nanostructures via Induction Heating

Brian David Sosnowchik
Liwei Lin
Albert P. Pisano
Ming C. Wu
2008
This work presents the development of a platform technology for the rapid synthesis of a wide range of onedimensional nanostructures using induction heating. The technique is fast, enabling the synthesis of nanostructures in as short as one minute, simple, clean, and scalable. The technique is also versatile, enabling the synthesis of nanostructures in bulk or locally on MEMS, and may open up a new class of rapid nanostructure synthesis. The...