Functional polymer silicon hybrids via surface initiated living radical polymerizations

... Si(100) Surface via Surface- Initiated Living Radical Polymerizations 157 8.1 Controlled Micropatterning of a Si(100) Surface by a Combination of Surface- Initiated Nitroxide-Mediated Radical Polymerization ... brushes by surface- initiated NMRP (Husseman et al., 1999) For functionalization of silicon surfaces, polymer brushes were grafted on the native oxide-covere...

Ngày tải lên: 14/09/2015, 18:24

... 4:773–777 Fig TEM images of the nanocomposites and nanocapsule combination of the surface-initiated atom transfer radical polymerization (SI-ATRP) technique and ultraviolet irradiated crosslinking ... 3a and b The collapse of the crosslinked polymeric shells during the etching in DMF maybe due to the lower crosslinking degree [29] and the osmotic pressure bet...

Ngày tải lên: 22/06/2014, 00:20

... Surface Functionalization of Silicon Substrates via SelfAssembled Monolayers 11 2.2 Surface Functionalization via Layer-By-Layer Approach 22 2.3 Surface Functionalization via Grafted Polymer Chains ... processes of RAFT-mediated graft polymerization of VBC on the Si-H surface and functionalization of the VBC graft- polymerized Si surface with viologen...

Ngày tải lên: 16/09/2015, 17:11

... Cross-sectional SEM analysis of the sample provided direct evidence to support a- SiNW growth via an SLS mechanism Fig 3a shows a low-magnification cross-sectional SEM image It is visible that a layer of a- SiNWs ... a large area Ž10 = 10 mm of 111 Si substrate after a h period of growth EDS analysis Žinset proved that the nanowires consist mainly of silicon...

Ngày tải lên: 16/03/2014, 15:05

... ring pattern (inset) in select area electron di raction (SAED) revealed that SiNWs are completely amorphous Though the reason why the resultant nanowires are amorphous instead of being crystalline ... growth, which is in fact an analogy of the VLS mechanism The growth process of the a- SiNWs via an SLS model is depicted schematically in Fig Cross-sectional SEM analysis of...

Ngày tải lên: 16/03/2014, 15:14

... dimensions These nanoparticles necessarily have a size smaller than the pores of the AAO mask and will be responsible for the constant dimensions of the synthesized nanowires Figure shows the surface of ... structure of the membrane and before the treatment conditions allow the nanowires growth As can be seen there, the catalyst can be observed as small particl...

Ngày tải lên: 21/06/2014, 01:20

... Position is plotted vertically along the sample where one region has a 20-nm Au film (top of Figure 1) and the bottom region only Si (c-d) SEM images corresponding to the postirradiation condition ... concentration of gold in the sample during irradiation as a function of fluence after LEISS and XPS quantification The plot of relative concentration (% Au) versus fluence displays t...

Ngày tải lên: 21/06/2014, 03:20

... synthesis of thermosensitive nanocables by the SI-ATRP method Gold nanowires (Au NWs) of 1.5–1.8 lm in length were prepared as the templates via a modified seeding growth method developed by our team ... properties of Au/PNIPAAm nanocables solely by adjusting the amount of cross-linker used Conclusions In summary, two types of thermosensitive Au/PNIPAAm nanocables were succes...

Ngày tải lên: 22/06/2014, 01:20

... and size of the nano-sheets were still preserved expect the slightly increase of the thickness of the nano-sheets However, the estimated size of the NiO grains was not consistent with the size and ... Conclusions In this work, we have demonstrated that the retention of shape and size of b-Ni(OH)2 nano-sheets during its transformation to the NiO nan...

Ngày tải lên: 22/06/2014, 22:20

... 45 Chapter Fabrication of Micro/nano Polymeric Patterns Through Reactive Reversal Nanoimprint Lithography and Surface- Initiated Polymerization 50 3.1 Introduction to Surface- initiated ... nano-architectures via a combination of reactive reversal nanoimprint lithography (NIL) and surface- initiated polymerization These finetuned architectures are utilized to gu...

Ngày tải lên: 11/09/2015, 10:01

... INTENSIFICATION OF INCLUSION BODY PROCESSING VIA SURFACE REFOLDING WITH CHEMICAL EXTRACTION NIAN RUI (B.Eng., TIAN JIN UNIVERSITY, PRC) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... of ATP concentration on the refolding yield of MDH (in the presence of ATP regeneration system) with or without the assistance of PEG 74 xv Figure 4.4 (A) Effe...

Ngày tải lên: 14/09/2015, 14:03

... crystalline silicon without oxygen and other impurities Conclusion Tin- catalyzed silicon nanowires (SiNWs) were synthesized at various hydrogen gas flow rates using the hydrogen radical- assisted deposition ... images of the as -synthesized SiNWs at hydrogen gas flow of (a) 130 sccm, (b) 150 sccm and (c) 180 sccm All the scale bars represent 2.5 µm (d) XRD patt...

Ngày tải lên: 16/03/2014, 15:10

... SYNTHESIS AND FABRICATION OF NANOSTRUCTURED FUNCTIONAL POLYMERIC MATERIALS via PLASMA PROCESSES AND POLYMER MODIFICATION ZONG BAOYU (B Sci., MBA) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ... develop simple and novel methods for the fabrication of fine polymer nanostructures and nanopatterns from fluoromonomers and pyrrole via plasma polymeri...

Ngày tải lên: 14/09/2015, 08:27

... surface of the SiNWs Because of the high standard electrode potential of the Au3 + /Au0 couple, Au3 + has high polarization and high chemical reactivity Au3 + could be easily reduced to Au0 in air ... mass-production of highly aligned SiNWs and their core/ shell structures with metal nanoparticles for the future applications in microelectronic and optoelectronic...

Ngày tải lên: 16/03/2014, 15:06

... Letters 371 ( 200 3) 394– 400 coverage, when the carbothermal reduction occurring at the CNPs/substrate interface is terminated after complete consumption of CNPs in contact with Si On the contrary, ... Letters 371 ( 200 3) 394– 400 Fig Pyramidal-shaped voids formed at the CNPs /Si(1 0) interface annealed at 105 0 °C (a) SEM image of pyramidal void and (b) magnified view of silicon n...

Ngày tải lên: 16/03/2014, 15:08