Deposition)들은 크게 두 가지로 분류가 되는데 하나는 PVD(Physical Vapor Deposition)이고 다른 하나는 CVD(Chemical Vapor Deposition)이다. 공정상의 뚜렷한 차이점은 CVD는 수십 ~ 수백 torr 내지는 상압의 환경에서도 충분히 가능하지만 PVD는 진공 환경을 요구한다는 것이다. PVD는 기판위에 증착재료를 물리적 mechanism에
tube furnace
ZnO nanocrystals were prepared by a chemical solution deposition (CSD)
The 0.75M precursor solution was deposited onto the Si substrate by spin coating
The as-deposited films were then preheated on a hotplate at 300 C for 10 min. Finally the sample was annealed at 500 C for 1 h.
ZnO powder and graphite powder were ground together
and loaded into an alumina boat
nitrogen, oxygen content (%weight)Proximate
analysis provides the information on the mode of combustion with which we are very
familiar as shown in Fig. 2. When wood burns, moisture evaporates first at temperatures
o
around 100
C (see Fig. 3). At higher temperatures, dry wood decomposes thermally into
volatile matter and char (fixed carbon)
of nitrogen
oxides
2.3 kilograms of carbon
dioxide
Solving the Plastic Water Bottle Problem
Unsanitary Lack of
Maintenance
Lost Public No Filters or
One Stage
Only
Instead of developing a different bottle, why not reduce
the need for them?
Public Water Fountain Problem
Transparency
Filtered
Hygiene (sensor)
Appealing (no drain)
Refilling station (bottle)
Service
TrubluIndoor Drinking Fountain
protective gloves, Jerome opens the liquid-nitrogen
cooled refrigerator. A cloud of condensed water vapor billows
out. Revealed inside the fridge are racks of labelled jars and
silicon pouches - some containing a yellowish liquid, some a
deep, red liquid.
In front of one of the jars is a handwritten shopping list -
"TRUFFLES, CIGS, VODKA". Jerome smiles to himself as he
retrieves the note