Fabrication of 3d photonic crystals with self assembled colloidal spheres as the template

... FABRICATION OF 3D PHOTONIC CRYSTALS WITH SELF- ASSEMBLED COLLOIDAL SPHERES AS THE TEMPLATE WANG LIKUI (PhD, NUS) DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE ... The TEOS amounts used in the synthesis of seeds and the final beads and the sizes of them Table 4.2 The sizes and the monodispersities of the PS...

Ngày tải lên: 11/09/2015, 09:01

... afford 3D PCs with a full PBG, it is still far away from practical applications because of the main two issues associated with self- assembled 3D PBG materials One is the domain size of a self- assembled ... formation (A) The thickness of the carbon layer is the same as the diameter of the spheres (B) The thickness of the carbon layer is less than the diamete...

Ngày tải lên: 16/09/2015, 08:29

... control of the thiols in the binary mixture solution of SH- and CH3-terminated silanes Nanoscale Res Lett (2009) 4:1319–1323 Conclusions We have introduced a method to control the average spacing between ... between aligned OMCVD-grown Au NPs by varying the volume% of SH-terminated silane in a binary mixture of SH- and CH3-terminated groups CH...

Ngày tải lên: 22/06/2014, 00:20

... particles also adhere to the silica layers on the surface of CMCs Finally, upon calcination, the CMCs (hard templates) and amphiphilic molecules (soft templates) are burnt off, and silica hollow microcoils ... Biointerfaces 2004, 38: 127-130 doi:10.1186/1556-276X-6-330 Cite this article as: Rodriguez-Abreu et al.: A combination of hard and soft templating...

Ngày tải lên: 21/06/2014, 04:20

... [13] Surface potential of thiol SAM pattern Figure 2a shows AFM topography image of the twothiols pattern, created by substituting thiol (CH terminated thiol) with thiol (COOH-terminated thiol) ... Figure AFM topography of CH3 thiol SAM and pattern AFM topography of (a) a uniformly covered CH3 thiol surface, and (b) a nanopattern shaved into a thiol surfac...

Ngày tải lên: 21/06/2014, 05:20

... and used without further purification as received Distilled water was used throughout Polyaniline Nanotubes The polyaniline coated halloysite nanotubes (PANI/ HNTs) hybrids were prepared as reported ... to the release of the acid dopant during the post-treatments such as washing and drying Conclusion In summary, an efficient approach for the preparation of the uniform PANI...

Ngày tải lên: 22/06/2014, 01:20

... arbitrary 3D metallic structures to be fabricated simply and efficiently, via two steps: a true 3D lithographic micro -fabrication based on two- photon polymerization followed by a selective silver electroless ... 3.4.3 3D fabrication with SU-8 2000 41 3.4.4 Shrinkage study of SU-8 2000 45 3.5 Summary 51 Chapter 4: Selective Electroless Silver Plating 53 4.1...

Ngày tải lên: 09/09/2015, 18:50

... APPLICATION OF RAPID PROTOTYPING TECHNOLOGY TO THE FABRICATION OF 3D CHITOSAN SCAFFOLD FOR TISSUE ENGINEERING GENG LI (B.Eng (Hons)) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... shown that chitosan appears to be a suitable matrix material for tissue engineering applications 3.2.2 The Properties of Chitosan Chitosan is...

Ngày tải lên: 30/09/2015, 13:49

... …………………………………………………………………………… 82 Numerical Simulations of Nanostructural Photonic Crystals List of Figures VI List of Figures Figure 1.1 Schematic pictures of one-, two- and three- dimensional photonic crystals (The ... computer memory Numerical Simulations of Nanostructural Photonic Crystals Chapter Introduction 1.3 Motivation The heart of the subject of...

Ngày tải lên: 27/11/2015, 11:19

... and Physics 113 (2009) 389–394 391 Fig FE-SEM images of the ZnO 3D nanostructures synthesized at different pH: (a) pH 9.0; (b) pH 9.5; (c) pH 10.0; (d) pH 10.5; (e) pH 11.0; (f) pH 11.5; (g) pH ... Room-temperature photoluminescence spectra from the ZnO 3D nanostructures grown in solutions of different pH ( ex = 266 nm) quality of self-assembled ZnO...

Ngày tải lên: 06/05/2014, 13:24

... through the structure The position of the PBG can be determined by selection of proper thicknesses and refractive indices Since we are interested in optical frequencies, the radius of the metallic ... when the resonance energy of the lower levels is within the band gap, the system is in an absorbing state However, when the resonance energy of the lower le...

Ngày tải lên: 22/06/2014, 00:20

... to fabrication and characterization of colloidal crystals as three-dimensional photonic crystals The effects of surfactants on the structure of polystyrene colloidal crystals and the effects of ... introduction of the basics, the optical properties and the fabrication of photonic crystals, as well as the objectives and organization of this project It wil...

Ngày tải lên: 05/10/2015, 22:32

... protruding LH2 rings, approximately 120 ° (Fig 2A) and 90° (Fig 2B), indicated two types of zig-zag lattice The inset of Fig 2A shows a high-magnification image of LH2 rings embedded in the 2D crystals ... 7.0 15.0 7.0 12. 0 E 5.3 7.1 10.9 LH2 density (µm 2) F 22 000 21 20 8 21 22 4 21 000 20 408 20 000 19 047 19 000 18 367 Strongly protruding LH2 (up) 18 000 A B C D E up-L...

Ngày tải lên: 18/02/2014, 18:20

... [10±13] and thermal evaporation [14±17] are two methods normally used for the synthesis of SiNWs The key point in these two methods is the formation of a sucient amount of silicon atoms and/ or silicon ... made of a Si core and a SiO2 sheath The one-dimensional growth of SiNWs is facilitated by the SiO2 sheath that con®nes the lateral growth of SiNWs, and the...

Ngày tải lên: 16/03/2014, 15:06

... separation of 5–20 mm with GaN powders, only some SiOx bundles were grown, while not well-aligned 2D arrays Hence, the relative placement of Si Fig SEM images of 2D close-packed arrays of SiOx nanowire ... consequently leading to a dense growth and self- assembly of SiOx nanowires Conclusions In summary, novel 2D ordered arrays self- assembled by SiOx...

Ngày tải lên: 16/03/2014, 15:11