News & Events

BSAC Seminar: Hollow Stems for Higher Micromechanical Disk Resonator Quality Factor

September 4, 2012
Lingqi Wu Department of Electrical Engineering and Computer Sciences, UC Berkeley BSAC Graduate Student Researcher September 4, 2012 | 12:00 to 12:30 | 540 Cory Hall, DOP Center Conference Room Host: Clark Nguyen

The use of hollow support stems to reduce energy loss to the substrate while supporting all-polysilicon UHF micromechanical disk resonators has enabled quality factors as high as 93,231 at 178 MHz and 56,061 at 329 MHz -- values now in the same range as previous disk resonators employing multiple materials with more...

BSAC Seminar: Chemical Sensor Using Optical Antenna

August 28, 2012
Tae Joon Seok Department of Electrical Engineering and Computer Sciences, UC Berkeley BSAC Graduate Student Researcher August 28, 2012 | 12:30 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Ming Wu

Optical antennas are widely used in surface-enhanced Ramon spectroscopy (SERS) because of their ability to focus light in sub-diffraction-limited area, resulting in strong field enhancement. The field enhancement depends critically on the gap spacing of optical antennas. Current nanofabrication techniques such as...

BSAC Seminar: Monolayer Semiconductor Devices

September 4, 2012
Hui Fang Department of Electrical Engineering and Computer Sciences, UC Berkeley BSAC Graduate Student Researcher September 4, 2012 | 12:30 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Ali Javey

Monolayer chalcogenides have recently been shown promising for future scaled electronics. We report high performance p-type field-effect transistors based on single layered (thickness, ~0.7 nm) WSe2 as the active channel with chemically doped source/drain contacts and high-ê gate dielectrics. The top-gated monolayer transistors...

BSAC Seminar: Microfluidic Reactors for the Synthesis of Monodisperse Nanoparticles

September 25, 2012
Yegân Erdem Department of Mechanical Engineering, UC Berkeley BSAC Graduate Student Researcher September 25, 2012 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Al Pisano

Microfluidic reactors – or microreactors – show promise for commercial-scale synthesis of nanoparticles with well controlled size, size distribution and shape. Compared to batch-wise synthesis techniques, microfluidic technology can provide better control of the reaction conditions, which is the key to controlling the product characteristics. Handling...

BSAC Seminar: Making VO2 Work

October 2, 2012
Prof. Junqiao Wu Department of Materials Science and Engineering, UC Berkeley October 2, 2012 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: John Huggins

Vanadium dioxide (VO₂) exhibiting coupled metal-insulator and structural phase transition at 67 degrees C is of great interest for both fundamental understanding of correlated electron physics and potential device applications. In this talk I will focus on the application side of our recent VO₂ work. By probing the phase transition under a surface electrostatic field or a...

BSAC Seminar: Towards Unprecedented Accuracy and Control, Extraordinary Dexterity, and CAD for the Masses

October 16, 2012
Prof. Jason Clark Schools of Electrical and Computer Engineering and Mechanical Engineering, Purdue University BSAC PhD 2005 October 16, 2012 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Kris Pister

Some metrology problems include: no two MEMS behave identically; lack of ASTM measurement standards; calibration can be 40% of manufacturing costs; experiment never matches simulation; and MEMS are precise but inaccurate. Some dextrous problems include: 10 microns or degrees is considered large deflection; packaging limits interaction...

BSAC Seminar: Computationally Inexpensive Simulation of Nanoimprint Lithography: Guiding the Development of Designs and Processes

October 23, 2012
Prof. Hayden Taylor School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore October 23, 2012 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Kameshwar Poolla

Nanoimprint lithography (NIL) offers sub-10 nm patterning resolution with lower capital costs than competing technologies. To be adopted widely in data storage and semiconductor manufacturing, however, NIL’s throughput needs to increase and its defect rate needs to fall. One way of improving NIL’s throughput and yield is to develop...

BSAC Seminar: Controlled and On-Demand Delivery of Drugs Using an Implantable MEMS Device

October 30, 2012
Dr. F. Nazly Pirmoradi Department of Mechanical Engineering, UC Berkeley BSAC Postdoctoral Researcher October 30, 2012 | 12:00 to 12:30 | 540 Cory Hall, DOP Center Conference Room Host: Liwei Lin

The effectiveness of drug therapy is dependent on the availability of therapeutic concentrations of drug at the disease site. Controlled and localized drug delivery systems provide temporal and spatial control of drug release and offer significant advantages over immediate release, conventional delivery systems. In this talk, Dr. Pirmoradi reports on the...

BSAC Seminar: Carbon Nanotube Microelectronics: Toward System-on-Plastic

October 30, 2012
Dr. Chuan Wang Department of Electrical Engineering and Computer Sciences, UC Berkeley BSAC Postdoctoral Researcher October 30, 2012 | 12:30 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: Ali Javey

Single-walled carbon nanotubes possess fascinating electrical properties and offer new entries into a wide range of novel electronic applications that are unattainable with conventional Si-based devices. In this talk, we report our recently developed platform for solution-based processing of high-purity...

BSAC Seminar: Insight into the Prototyping and Validation of Micro- and Nano-Sensors Dedicated to a Sustainable Urbanization

November 6, 2012
Dr. Bérengère Lebental French Institute of Science and Technology for Transport, Development and Networks (IFFSTAR) November 6, 2012 | 12:00 to 01:00 | 540 Cory Hall, DOP Center Conference Room Host: John Huggins

While today's galloping urbanization weighs heavily on both people and environment, the massive instrumentation of urban spaces appears a landmark toward sustainability. Collecting massively distributed information requires the use of high performance communication systems as well as sensors with very small ecological...