recognition in nanoscale systems.
While microfabrication techniques such as photolithography, microcontact
printing, micromachining, and microwriting can produce patterns as small
as 0.1 mm, production of sub-100-nm structures still poses a significant
challenge.
At present, such high-resolution fabrication can be achieved using scanning
probe lithography (SPL).
scanning acoustic microscopy – 나선형의 패턴
Fourier Transform Analysis (FTA)는 청각영상(acoustic image)의 주기성을 시험하는 방법이다. 아 래의 figure를 보면 A는 단일한 회색의 점무늬가 패턴을 보이지 않고 존재하는데 반대로 침을 회전 했을때는 B에서처럼 나선형의 패턴이 분명히 보인다. 이 나선형의
Microscope)
Images are produced by scanning a focused electron beam across the surface of a specimen. In the most common mode, the low energy secondary electrons emitted are detected and used to modulate the brightness of a synchronously scanned CRT. Other signals can also be detected. X-rays, characteristic of that part of the specimen probed by the electron beam, allow both a qualitative an
SEM?
Scanning electron microscope
To analysis surface of specimen
Qualitative analysis at certain point
Operation principal of SEM
Emission electron from filament
Accelerate electron by electric field
Focusing electron by lens → mono-chromatic electron beam
Generate secondary electron and etc.
Detection of electron
Scanning Probe Microscope)을 개발하면서 확인할 수 있었다.
(그림) Nano Scale
- NT (Nano Technology)
․ 1~100 크기의 물질을 규명, 제어, 창조하는 기술
․ 원자나 분자 단위의 크기 물질을 다루는 기술
- 왜 나노가 필요한가?
세상에는 약 100종류의 원자가 존재하지만, 원자만으로는 다채로운 기능을