Presentation is loading. Please wait.

Presentation is loading. Please wait.

”Formation of an oxide network through polycondensation reactions of a molecular precursor in a liquid” A sol is a stable dispersion of colloidal.

Similar presentations


Presentation on theme: "”Formation of an oxide network through polycondensation reactions of a molecular precursor in a liquid” A sol is a stable dispersion of colloidal."— Presentation transcript:

1

2

3

4

5

6

7 ”Formation of an oxide network through polycondensation reactions of a molecular precursor in a liquid” A sol is a stable dispersion of colloidal particles or polymers in a solvent. The particles may be amorphous or crystalline. An aerosol is particles in a gas phase, while a sol is particles in a liquid, A gel consists of a three dimensional continuous network, which encloses a liquid phase, In a colloidal gel, the network is built from agglomeration of colloidal particles.

8

9

10 Factors in determining properties –Rate of Hydrolysis –Drying Ability to grow nano-sized particles in different matrices

11

12

13

14 Fase Uap : Pembuatan thin film Atomic Layer Deposition (ALD) Fase Liquid : Proses coloid untuk pembentukan annopartikel dan self assembley pada monolayers Fase solid : Segretasi untuk pembuatan parikel metalik di dalam matrik glass dan induksi polimerisasi doa photon pada fabrikasi kristalphotonik tiga dimensi Fase Hybrid : Penumbuhan vapor-liquid-solid (VLS) pada nano wires

15 Nanopartikel : Proses coloidal, flame combution,dan segretasi Nanorods : templed-based electroplating, solution-liquid- solid growth (SLS), spontanious anisotropic growth Thin film : molecular beam epitaxy (MBE) amd atomic layer deposition (ALD) Nanostructured bulk materials :photon bandgap crystals by self essembly of nanosized particles.

16 from Dr Schroeder’s web page, college of St. Scholastica e.g. amphiphilic lipids when placed in water will form bilayers, vesicles or micelles. - cell membranes e.g. DNA - complementary strands ‘Spontaneous change in a system from a more disorganised state to an ordered or structured state.’

17 alkanethiol on Au{111}. Prof. Weiss Group, Penn State University strong interaction between head group and surface, e.g. thiol on Au, the tail can then be adapted at will. SAM’s are useful as model substrates, biomembrane mimetics, for studying electrical conduction through individual molecules, chemical patterning of surfaces etc.

18 A ‘playable nanoguitar’ made in Cornell University NEMS group 30 nm W lines on Si; from the University of Glasgow department of Electrical and electronic engineering lithography group

19 thin films carbon nanotubes inorganic nanotubes nanowires nanoparticles quantum dots Lauhon, Gudiksen, Wang, and Lieber; Science 2002, 420, p.57 Mayya et al.; Nano Lett. 2001, 1 (12), p.727 titania - possible applications in enhanced photocatalysis

20


Download ppt "”Formation of an oxide network through polycondensation reactions of a molecular precursor in a liquid” A sol is a stable dispersion of colloidal."

Similar presentations


Ads by Google