surface of nanowires. And then with the continuous supplementation of Zn and ZnOx, they nucleate on the surface of ZnO layer and form the large nanoclusters. With the further absorption, ZnO nanorods grow from the top of nanoclusters.
Fig. 2 (c) low magnification SEM image of the two-step-prepared product, (d) and (e) high-magnification SEM image of single hierarchical pure ZnO nanostr
Fig. 1 b depicts the SEM image of the coated product, indicating that dense wire-like nanostructures were observed. Statistical analysis of many SEM images indicated that the average diameter of the produced 1D structures was in the range of 50-110nm. The inset of Fig. 1 b shows a typical closer-view SEM image of MZO-coated ZnO nanowires. It is noteworthy that the surface of the MgO-coated nanowi
is harmful to human health in its own right.
2. NOx reaction produces tropospheric ozone.
3. NOx causes acid rain, smog, and destruction of forests.
- This problems become more serious due to the rapid increase of car.
Sensitivity
▪ Temperature
▪ Catalyst
▪ Large surface area
▪ Low carrier concentration
▪ Small grain size
▪ Metal oxide structure
2. Discuss
- Probe experiments at the hands of the participants so the experiment result can be errors.
- As in the case of the specimen in contact with the probe is part of the specimen uneven or rough surface causing the problem occurs.
- The specimen could never achieve exactly perpendicular with probe so the error can be occur
Purpose of Experiment
Understanding experimental
analyzing method from XRD
Understanding
application of XRD
Understanding
Principle of XRD
Understanding and analyzing of XRD perfectly
Reason of Error
Impurities
Sample
Rough surface
→ Having to fix x,y,z axis
Non uniform powders
→ Changing surface
Geometrical structure factor
High stress
→Distortion, screw.
surface. But the most challenging assignment is that we should fix it into American’s appetite, so our product needs to be divided into some category in accordance with its taste.
Promotion
We will promote our product at an open place like an entrance of the stadium or a central place to get the consumer’s notice with some events like the free sampling party or the contest of fa
measured by the market price.
분배효율성 : 가격이 한계비용과 같을 때, 회사는 시가에 의해서 측정된 소비자의 욕구의 정확한 수준에 맞춰 생산을 확장한다.
American Federation of Labor(AFL) : The first business union, founded by Samuel Gompers in 1886. The AFL was an exclusive union organized for skilled workers.
미국노동총동맹 : 첫 번
Oxide formation temperature zones(1) 250-600℃ : Anodic oxidation, CVD, Sputerring(2) 600-900℃ : CVD (TEOS organic pyrolysis)(3) 900-1200 ℃ : Heat Oxidation(dry / wet)
dry oxidation
Usually due to excellent SiO2 surface properties used to form a thin oxide in the device structure
Si + O2 → SiO2
wet oxidation
Due to rapid growth rates used to form a thick
Layer. About 1
conductivity measurements. The results show that the Au parti- cles are well-protected by the dithiol linker molecules and do not fuse into larger un- ited. The thin film material obtained clearly exhibits nonmetallic properties(i.e., electro -hopping conductivity and optical constants very different from those of metals).
Experimental
Preparation of gold seed solution