Nanotechnology

Bacteria interacting with a nanostructure

Scientists show which surfaces attract clingy Staph bacteria

03/04/14 Berkeley Lab — Berkeley Lab and UC Berkeley researchers are investigating how shapes and surface texture influence the adhesion of infectious Staphylococcus Aureus bacteria. Their work, led by Mohammad Mofrad, a Berkeley Lab faculty scientist and a professor of bioengineering and mechanical engineering at UC Berkeley, could guide the development of bacteria-resistant materials.

Engineers create light-activated ‘curtains’

01/09/14 — A research team led by UC Berkeley's Ali Javey, associate professor of electrical engineering and computer sciences, used carbon nanotubes and plastic polycarbonate to create a new material that moves in response to light. The material can be used to create “smart curtains” that open or close with the flick of a light switch.

Bend it like Wu

11/01/13 — Materials science and engineering professor Junqiao Wu and Berkeley Lab colleagues have created a microscale actuator that's smaller than the width of a human hair and can bend like a finger.

Berkeley to house NSF-funded nanoscale microscope

09/20/13 QB3 — Researchers using a new tool in QB3-Berkeley's Biomolecular Nanotechnology Center will investigate matter on an unprecedented scale, thanks to a $2 million NSF grant for the purchase and installation of a new ORION Nanofab microscope.

Berkeley and Stanford launch nanofabrication partnership with TSI Semiconductors

08/15/13 — The College of Engineering at the University of California, Berkeley announced that its Marvell Nanofabrication Laboratory, along with Stanford University's Nanofabrication Facility, has initiated a virtual technology transfer exercise with TSI Semiconductors, LLC, a specialty foundry offering flexible technology development and advanced manufacturing solutions for projects ranging from the smallest to very large lot sizes.

Precious cargo

11/01/12 — Researcher Ting Xu's new nanocarrier delivers drugs directly to tumors, then disassembles to safely leave the body.

Self-assembling nanorods: Berkeley researchers obtain 1, 2 and 3D nanorod arrays and networks

02/01/12 Berkeley Lab — A relatively fast, easy and inexpensive technique for inducing nanorods to self-assemble into one-, two- and even three-dimensional macroscopic structures has been developed by a team of Lawrence Berkeley National Laboratory researchers. Leading this project was Ting Xu, a polymer scientist who holds joint appointments with Berkeley Lab's Materials Sciences Division and UC Berkeley's Departments of Materials Science and Engineering, and Chemistry.

Driving toward millivolt electronics

12/01/11 EDN — Thanks to new behaviors and the characteristics of materials at small geometries, nanotechnology has the potential to introduce great change to the electronics arena. UC Berkeley's Center for E3S (Energy Efficient Electronics Science) is working to develop fundamental devices that will result in a millionfold reduction in power for future generations of electronic systems. EECS professor Eli Yablonovitch leads the research group, which focuses on nanoelectronics, nanomechanics, nanophotonics, nanomagnetics, and system integration.

Tracking the mighty microbe

08/18/11 — Jillian Banfield studies very, very small things, but her work is vast in its scope and impact. So vast, in fact, that her discoveries have implications for space, the human body and nearly everything in between. Banfield, a biogeochemist, geomicrobiologist and professor of materials science and engineering, studies microbes-their function and potential both individually and in groups. “Microorganisms are essentially everywhere,” says Banfield, “and they carry out all the really essential transformations that drive earth's biogeochemical cycles.”

Building the bio toolkit

05/04/11 — In the 1970s, the Berkeley-bred SPICE (Simulation Program with Integrated Circuit Emphasis) revolutionized microelectronics by creating a toolkit now used worldwide as the standard for circuit design. Our new Synthetic Biology Institute (SBI), launched on April 25, aims to repeat this feat with biological and chemical engineering.

The laser whisperer

03/02/11 — A research team led by Xiang Zhang, professor of mechanical engineering and faculty scientist at Lawrence Berkeley Laboratory, has taken inspiration from the phenomena of whispering galleries - such as the U.S. Capitol's Statuary Hall or Grand Central Terminal in New York - and their remarkable acoustical features to achieve a major scientific breakthrough in the use of plasmon lasers. By creating a technique to bounce surface plasmons inside of a nanosquare device, much in the way sound waves reflect back and forth in a whispering gallery, the team was able to operate plasmon lasers at room temperature, overcoming what had been a major barrier to practical utilization of the technology.

Berkeley scientists create more efficient photocatalyst for use in clean technologies

01/29/11 AZoM — A little disorder goes a long way, especially when it comes to harnessing the sun's energy. Scientists from Berkeley Lab jumbled the atomic structure of the surface layer of titanium dioxide nanocrystals, creating a catalyst that is both long lasting and more efficient than all other materials in using the sun's energy to extract hydrogen from water. "We are trying to find better ways to generate hydrogen from water using sunshine," says Samuel Mao, a mechanical engineering professor and scientist in Berkeley Lab's Environmental Energy Technologies Division who led the research.

Hotspots tamed by BEAST: Secrets of mysterious metal hotspots uncovered by new single molecule imaging technique

01/19/11 Berkeley Lab — The secrets behind the mysterious nano-sized electromagnetic "hotspots" that appear on metal surfaces under a light are finally being revealed with the help of a BEAST. Using the Brownian Emitter Adsorption Super-resolution Technique (BEAST), "we were able to map the electromagnetic field profile within a single hotspot as small as 15 nanometers with an accuracy down to 1.2 nanometers, in just a few minutes," says Xiang Zhang, a principal investigator with Berkeley Lab's Materials Sciences Division and the Ernest S. Kuh Endowed Chaired Professor of Mechanical Engineering at UC Berkeley.

She paints for power

10/05/10 — What will power our next-generation gizmos? The microdevices, nanodevices and picodevices of the future? Our prediction: the Christine Ho battery. As an MSE graduate student, Ho (B.S.'05, M.S.'07, Ph.D.'10 MSE) developed a novel microbattery technology that promises to not only power the smallest of smart devices but also accelerate a variety of energy applications, from better home energy monitoring systems to large-scale energy storage solutions for wind and solar farms.

Nanoscientist with big aspirations

08/09/10 — Artificial skin that bestows the sense of touch on prosthetic limbs. Nanochips that control the latest smart phones and devices. Sheets of low cost solar cells as easy to install as unrolling a carpet. All future scenarios, yes, but ones that EECS associate professor Ali Javey is working to realize in the next decade or so. Javey, a chemist by training, develops new electronic materials and methods of processing existing materials destined for future applications.

Nanosized light mill drives micro-sized disk

07/05/10 Berkeley Lab — Engineers at Lawrence Berkeley National Laboratory and the University of California Berkeley have created the first nanosized light mill motor whose rotational speed and direction can be controlled by tuning the frequency of the incident light waves. This new light mill opens the door to a broad range of valuable applications, including a new generation of nanoelectromechanical systems (NEMS), nanoscale solar light harvesters, and bots that can perform in vivo manipulations of DNA and other biological molecules.

Engineering health reform

04/07/10 — The health care reform bill enacted last month is the most far-reaching domestic policy the nation has seen in decades. Only time will tell us all the ramifications of this historic legislation. As the acting dean of the College of Engineering I ask, how can engineers help patients, physicians and providers make the best use of the changes ahead?

Mother of invention

02/03/10 — Berkeley Engineering alumna Michelle Khine, now an assistant professor of biomedical engineering at UC Irvine, has discovered an inventive scientific approach to fabricating cheap microfluidic devices using Shrinky Dinks. When her method of printing microfluidic patterns on Shrinky Dink sheets -- using a laser-jet printer, then heating them in a toaster oven to create patterns of channels and microwells -- was featured and published online in Lab Chip, it had more downloads in one month than any other paper previously posted by the UK's Royal Society of Chemistry.

Nanoneedles Point the Way to Sharper Sensors

06/04/09 — Last year, Connie Chang-Hasnain and graduate student researcher Linus Chuang were searching for a better lab recipe for growing nanowires, conductive threads so thin that every atom they contain has a significant effect on their overall electrical properties. Following the vapor-liquid-solid (VLS) technique for creating semiconductor crystal nanowires, they deposited successive layers of gallium arsenide onto a silicon wafer substrate. But in one low-temperature batch, an area of the silicon lacked the usual gold nanoparticles from which each crystal grows. Under careful examination of the region, they didn't find what they were expecting. Instead of uniform-diameter threads sticking up, they saw tall, needle-like pyramids with hexagonal bases and sharp points. They had discovered a new nanostructure.

Nano Song Goes Viral

06/04/09 — A music video that playfully celebrates all things nano has become a megahit for three Berkeley Engineering graduate students and their Cal team.