Last thursday to friday we joined KVS (Korean Vacuum Society) conference. We presented a poster titled: Instability of a droplet between nanoscale dual rough surfaces coated with hydrophobic DLC films. In the picture from left to right: Harry Kim, Taegon Cha, Ahmed Faruque, me.
Categories: life
My profile appeared in BK Newletter last December 2007. It was a newsletter published by BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace System. For this, I was awarded by a shopping coupon payable in several stores :)
Categories: life
Today I will show you some pictures of Atomic Force Microscopy (AFM) of several nanostructured-materials I made in my lab. They were mostly made by diamond coating (RF CVD/RF Chemical Vapor Deposition) on a prepatterned-polymer (soft lithography). Surprisingly, the structures consisted of micro- and nano-wave with dots-like undulation. This phenomena is believed to be the effect of nanoscale wrinkling process between a high intrinsic stress of diamond to the soft polymer. The applications ranged from the mimick of superhydrophobic surfaces of lotus leaf to anti wear coating for stents in biomedical devices. Next time let’s see many other beauties of nanoworld in tissue and biological engineering. 
Categories: Science
While people are now recognized 10+20= 100.000.000.000.000.000.000 meters as the largest distance in the universe (well it is not the limit of the universe actually because till now nobody knows the end of the space), in nanotechnology we will deal with sub or nanoscale distance, a unit of length equal to one billionth of a meter . The pictures below show how small is our sun compared to some giant stars in the universe in contrast with some nanoscale creatures in nature.
In nanotechnology, the term small refers to matters in 1 to 100 nm size. There are several reasons why matters are become very critical at this scale: 1. in biological system, it is the dimensional scale where a system starts to work, ex. protein, virus, etc. 2. matters behave in unusual way (chemical, magnetic, physicl properties) at this scale. 3. So far, it is the technology that can be achieved in reality by human being, though in very small applications we can also move to angstrom scale such as shifting the individual atoms by Scanning Tunneling Microscopy (STM).
To summary the scientist’s works on this small things, a journal Titled “Small” was created and it has impressive impact factor of 6.024 in 2006.
Categories: Science
