Controlled synthesis of nanostructures and their optical properties

... 3.3 33 Synthesis and characterization of the CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched nanorods ………………………… 3.2 32 41 Optical properties of the Au-deposited CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched ... sandwiched nanostructures In this section, we compared the optical properties of the sandwiched nanorods with that of the pure CdS nanorods, CdSe nanorods and a 1:1...

Ngày tải lên: 03/10/2015, 21:57

... oxygen and are further oxidized into SnO2 droplets The enhanced absorption and diffusion of tin oxides occurred at SnO2 liquid tip will finally form SnO2 nanowires A typical room-temperature photoluminescence ... of the nanowires follows a self-catalytic VLS process First, SnO2 nanoparticles decomposed into Sn and SnO vapor Sn and SnO vapor subsequently are transported to...

Ngày tải lên: 19/03/2014, 16:48

... The growth process of the different 1D TiO2 nanostructures was monitored by SEM and TEM Fig 2(a–c) shows the SEM images of the samples S1–S3, respectively, which reveal that the reaction of TiO2 ... PEG-300, 1D nanostructures of different morphologies such as nanorods, nanowires and nanotubes with different diameters and lengths were formed To understand the format...

Ngày tải lên: 20/03/2014, 13:08

... understanding of the shape and sizedependent properties of α- Fe2 O3 In this paper, we propose an easy route for fabricating αFeOOH nanorods via a low-temperature hydrothermal method The α- FeOOH nanorods ... FESEM image of the as-obtained α- FeOOH nanorods and (b) TEM image of a single α- FeOOH nanorod (inset: SAED pattern of a single α- FeOOH nanorod); (c) FESEM ima...

Ngày tải lên: 05/05/2014, 15:26

... can render very high coercivity with the higher contribution of shape anisotropy and higher coercivity hybrid nanorods can find applications in fields such Fig M(H) curves of Ni @ Co nanorods; a at ... fabrication of such a one-dimensional system namely Ni @ Co nanorods, which is essentially a core–shell architecture (Ni as core and Co as shell) and studies on their...

Ngày tải lên: 22/06/2014, 00:20

... SYNTHESIS OF SUPERPARMAGNETIC NANOSTRUCTURES AND THEIR MAGNETIC RESONANCE IMAGING APPLICATIONS CHOO SHI GUANG, EUGENE (B APPL SCI., HONS), NUS A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ... Study of Magnetic Nanostructures for Off -Resonance MR Spectroscopic Imaging 127  6.1  Motivations and Design of Experiment 127  6.2  Preparation and Characterizati...

Ngày tải lên: 09/09/2015, 17:55

... IONP@PC and IONP@mC-600 Insets of C and F: SAED patterns of IONP@PC and IONP@mC-600 95 Figure 6-4: Particle size distributions of (A) IONP@PC and (B) IONP@mC-600 96 Figure 6-5 TEM images of IONP@mC-600 ... iron oxides and lithium was in the 1980s.[51] However, the nature of the reaction was not clear until J M Tarascon and his coworkers reported the conversion reaction...

Ngày tải lên: 10/09/2015, 09:30

... nanorods and nanoparticles 58 3.3 Optical properties of ZnS nanorods and nanoparticles 69 3.4 Summary 73 3.5 References 74 Chapter Synthesis and Optical Study of ... a layer of larger bandgap semiconductor on the surface of one with a narrower bandgap In this case, the bandgap of the core falls within that of the shell, therefore both the electrons and holes .....

Ngày tải lên: 11/09/2015, 09:11

... Whereas optical < /b> and < /b> MO spectra are often swamped by too many transitions between occupied and < /b> empty valence states, x-ray excitations have the advantage that the core state has a purely local wave ... ELECTRONIC < /b> STRUCTURE < /b> AND < /b> MAGNETO-< /b> OPTICAL < /b> PROPERTIES < /b> OF < /b> SOLIDS < /b> TLFeBOOK This page intentionally left blank TLFeBOOK...

Ngày tải lên: 17/03/2014, 14:51

... occurred immediately Then the mixture solution was transferred into a commercial stainless steel Tef- lon-lined autoclave of 50 mL capacity The autoclave was maintained at a temperature of 18 0°C ... water and absolute ethanol respectively, and finally dried in air at 60°C The XRD pattern of prepared powder sample was collected using a Rigaku D/ Max-2200PC X-ray diffractom...

Ngày tải lên: 19/03/2014, 16:48

... consisted of the a-Fe2O3 Fig The I–V characteristics of (a) the ITO /a-Fe2O3 film /a-Fe2O3 NW/ CAFM-tip structure and (b) the ITO /a-Fe2O3 film /CAFM-tip structure Fig The CAFM images of (a) morphology and ... 108 NWs/cm2 123 332 Fig (a) TEM image of an a-Fe2O3 NW, (b) HR-TEM image of the a-Fe2O3 nanowire, and the SAED pattern of the a-Fe2O3 NW (inset) for sample C,...

Ngày tải lên: 20/03/2014, 13:08

... effect 3.6 Effects of alkali source TEM micrographs of ZnO prepared with different concentration of NaOH are shown in Fig 7.With the molar ratio of Zn2+ to NaOH Fig TEM images of ZnO prepared with ... prepare ZnO nanostructures in the presence of annexing agent As shown in Scheme 1, CTA+ and hydroxyl groups coming from the additive of CTAB and PEG400 respectively can ads...

Ngày tải lên: 06/05/2014, 13:23

... the classes of groups that are closed Let S be a class of classes of groups and suppose that every intersection of members of S belongs to S: for example, S might consist of the closed classes of ... G/Ni ∈ X and Ni = i=1 90 Classes of groups and their properties Note that a group G ∈ R0 X if and only if G is isomorphic with a subdirect product of a...

Ngày tải lên: 12/05/2014, 01:59

Ngày tải lên: 13/05/2014, 09:07

... sections of the HABAM, mobility, transfers and balance, each had high correlation with the HABAM total score and with each other [27] Cronbach's alpha for the HABAM total score, mobility, transfers and ... EMS and original HABAM but not for the PPME This is a limitation of the EMS and HABAM as important change and measure- Page 11 of 15 (page number not for citatio...

Ngày tải lên: 18/06/2014, 22:20