Published by : Huifeng Lee

It has been a long history that nanotechnology professsionals use ultrasonic technology, for sample ultrasonic agitation to clean substrate surface, promote particles or molecules diffusion, and so on. Rcently It has drawn my attention that ultrasonic technolgoy has been applied to the consumer market as well. Two feature examples are the use of ultrasonic technology to clean teeth […]

A conference on the research of Lithium-ion battery was held in the AT&T center at UT Austin campus. Detailed information can be found through following link. http://lithium.eventbrite.com/?utm_source=eb_email&utm_medium=email&utm_campaign=event_reminder&utm_term=event_title The world lithium-ion reasearch leaders, including Jonh Goodenough, Rachid Yamazi., et al, gave their wonderful review and projection of the battery technology. The conference covers wide range of […]

Tyndall effect (also known as Tyndall scattering) is a light scattering by particles in a colloid or a fine suspension. Example of Tyndall effect includes the visible beam of headlight in a foggy night.  Tyndall scattering is similar to the Rayleigh scattering. The fundamental difference is that the scattering particle is much smaller than the wavelength (less than one […]

  Spin coating 4000 rpm for 30 sec, results in about 0.5 µm film. Prebake 115°C on hotplate for 4 min. Exposure under UV illumination with a dose about 25mJ/cm2. (in our case 7.3mW/cm2 x 3.5 sec also works well). Develop in MF319, about ~40 sec. 

  Spin coating 5000 rpm for 30 sec, results in about 1.25 µm film. Prebake 110°C on hotplate for 60 sec. Exposure under UV illumination with a dose about 19mJ/cm2. (in our case 7.3mW/cm2 x 3sec also works well). Post bake on hotplate 120°C for 2 min. Flood illumination of UV with typical dose more than 200mJ/cm2. (in our case, […]

Following is my notes based on the seminar by Prof. Ajayan from Rice University at UT AUstin on April 15, 2011.  Seminar Name: “Engineering nanocarbons: future and challenges”  How to make better carbon? Grierson, JAP 107, 0333523, 2010 Sp2/sp3 transform (beautiful TEM images), Banhart, Ajayan, Nature 1996 Defect engineering sp2- disc, cone, tube, – Thomas […]

The following are my notes based on the seminar by Prof. Jiwoong park from Cornell at the UT Austin on April 14, 2011. Functionality New material new devices, achieving potential  applications need manipulation Challenges: Single CNT devices, not many publications, challenging part is you need to locate CNT and use lithography to define electrodes, CdSe/ZnS quantum […]