Conjugated organic semiconductors
Expansion or contraction of the polymers by mobile solvated ions
Applied to several microsystems and actuated catheters, circulation pumps, etc.
Low level charge injection Quantum mechanical effects dominate
High level charge injection Coulomb forces dominate
Repulsive force between same charges
Discharging process
wh
It appears that the structure of the material in solution is rather more complex.
There is evidence that dialkylmagnesium is present
2 R - Mg - Br ⇄ R - Mg - R +MgBr2
and that the magnesium atoms, which have the capacity to accept two electron pairs from donor molecules to achieve a four-coordinated state, are solvated by the unshared pairs of electrons on diethyl ether :
용액(Unsaturated solution)
: 용액이 녹을 수 있는 한계보다 적은 양의 용질을 포함하는 용액
과포화 용액(Supersaturated solution)
: 포화 용액에 존재하는 용질보다 더 많은 양의 용질을 함유하는 용액
용매화(Solvation)
: 어떤 이온이나 분자가 특정한 방식으로 배열된 용매분자에 의해 둘러싸이는 과정
(2) Column Chromatography
Column chromatography에서는 stationary phase와 solid adsorbent가 vertical glass column에 위치하고 mobile phase인 solvent는 column의 위에서 가하여 아래로 흘러내리게 한다. 이 때, gravity를 이용하는 것과 external pressure를 가해주는 두 가지 경우가 있는데 압력을 가해주는 방식이 좀 더 빠르게 column을 흘러
Reasons of using Cellulose
Why Cellulose?
There are Abundant resources in Earth.
- Don’t have to worry about running out the energy.
We don’t need to waste food.
- Solve the ethic problems for using other biomass.
We can reduce GHG(Green House Gas).
- Eco friendly energy.
What's the problems?
It is difficult to separate the cellulose from wood.
- Components of wood :