Ion ImplantationIonized dopant atoms are physically forced into the silicon crystal by accelerating them through high potentials (3 kV- 3 MV) toward the silicon wafer.
– Mass separator allows each implanter to run multiple
processes (B, P, BF2, As...)
– Low temperature (room temperature ~200 °C)
• can use photoresist as a mask
– Needs to be followed by an anneal
Contents
Ion channels ion-selective and fluctuate between open and closed states
The membrane potential in animal cells depends mainly on K⁺ leak channels and the K⁺ gradient across the plasma membrane
The resting potential decays only slowly when the Na⁺- K⁺ pump is stopped
The three-dimensional structure of a bacterial K⁺ channel shows how an ion channel can wo
Channel protein
; hydrophilic pore
Ion channel - highly selective pore
open and close
passive transport-diffuse
Nerve cell - Ion channel 이용
Ion channels ion-selective and fluctuate between open and closed states
Ion channel 의 Property
-ion selectivity
-open and close(gate)
Specific stimulus에 의해 open
by lithium ion intercalation
Si has theoretical capacity of 4200mAh/g
Due to it’s large volume change, pulverization can be occurred.
Silicon has high-capacity but poor cycle stability
Carbon has low-capacity but good cycle stability
So silicon/carbon composites can have higher capacity than single carbon anode,
and better cycle stability than single silicon anode.
An ion beam is a type of An ion beam is a type of particle beam consisting of ions.
Ion beams have many uses in electronics manufacturing (principally ion implantation) and other industries.
아르곤 이온은 위의 과정으로 생성 됩니다.
전자기 코일 또는 영구 자석으로부터 얻은 자기장은 종종 전자의 소용돌이를 만들기 위해 양극과 음극 사
•Do you remember this ?
Structural degradation to cause instability
Risk of explosion
Safe & Stable
Battery
Cracks developed in the electrode tears the capsule and release CNT to restore the flow of current.
->Self-Healing
This is the structure which put CNT capsules into virus.
1. How is it better ?
The capsules doesn’t have to move to the target. I
[Anode material]
The potential that is close the standard electrode potential of Li.
High energy density per volume & weight
Excellent cycle stability (Coulomb effeciency)
Have to endure rapid charging or discharging
Stability
.
.
.
[High Voltage]
[Pollution-Free]
[long cycle life]
[No Memory Effect]
[Safer than Lithium ion battery]
[lower internal resistivity]
[advantageous
9R-1. Affinity chromatography, Ion chromatography, gel chromatography를 각각 설명하라.
Affinity chromatography
서로 생물학적으로 높은 특이적 친화성을 갖는 2종류의 물질중 한 쪽을 고정상으로 사용하여 그 고정상에 대한 친화성의 차이를 이용해 목적물질과 불순물을 분리하는 크로마토그래피. 예를 들어 특이성이