News

05.03.2016

Michael and co-worker's publication on conduction in metal inverse opals is being featured in press coverage by both the nanotechnology and thermal management communities! See the full articles at nanotechweb.org and electronics-cooling.com

02.26.2015

Here is the abstract for the article:

Thermal phenomena in many biological systems offer an alternative detection opportunity for quantifying relevant sample properties. While there is substantial prior work on thermal characterization methods for fluids, the push in the biology and biomedical research communities towards analysis of reduced sample volumes drives a need to extend and scale these techniques to these volumes of interest, which can be below 100 pl. This work applies the 3ω technique to measure the temperature-dependent thermal conductivity and heat capacity of de-ionized water, silicone oil, and salt buffer solution droplets from 24 to 80 °C. Heater geometries range in length from 200 to 700 μm and in width from 2 to 5 μm to accommodate the size restrictions imposed by small volume droplets. We use these devices to measure droplet volumes of 2 μl and demonstrate the potential to extend this technique down to pl droplet volumes based on an analysis of the thermally probed volume. Sensitivity and uncertainty analyses provide guidance for relevant design variables for characterizing properties of interest by investigating the tradeoffs between measurement frequency regime, device geometry, and substrate material. Experimental results show that we can extract thermal conductivity and heat capacity with these sample volumes to within less than 1% of thermal properties reported in the literature.

09.17.2014

Congrats to PhD alums Yoonjin Won (2011) and Jaeho Lee (2012), who are joining the UCI Mechanical and Aerospace Department. They will build programs ranging from nanoscale conduction to advanced convective heat sinks.  We wish them both the very best!

09.17.2014

Ken Goodson and the nanoheat group have been awarded the Technical Excellence Award from the Semiconductor Research Corporation (SRC), for their work studying heat transfer in electronic nanostructures and packaging, microfluidic heat sinks, and thermoelectric and photonic energy conversion devices.  The award was presented September 8 at SRC’s annual TECHCON conference in Austin, Texas.  

The Semiconductor Research Corporation funds several hundred research groups and principal investigators each year, largely through 3 year contracts that are awarded  based on open calls for proposals and competitive review by its corporate liasons.  The Technical Excellent Award is given to one PI or team annually to recognize key contributions to technologies that significantly enhance the productivity of the semiconductor industry.