Abstract: Mesoporous carbon with high surface area and ordered structure was synthesized via a
nanocasting process using mesoprous MCM-41 silica as a template and sucrose as a carbon
precursor. Sample was characterized by XRD, SEM, TEM and nitrogen adsorption. The results
show that the templated carbon has a BTE surface area ∼1200 m2/g, a pore volume ∼1.0 cm3/g, and
a bimodal porosity centered at around 4 nm and 46 nm.
Abstract: Toward the tailored growth of carbon nanotubes (CNTs), CNT growth using hydrocarbon
ion beams at the ion energy of 150 eV and the ion current densities of 10 ∼ 165 μA/cm2 was
challenged at various growth temperatures. Fibrous protrusions with an amorphous nature grew at a
low ion current density, whereas highly crystallized multi-wall CNTs were synthesized at high ion
current densities. The higher the growth temperature and the ion current density, the smaller the CNT
diameter. Similar to the conventional PECVD-grown CNTs, they grew via the so-called “tip-growth
Abstract: Submicrosized porous hollow silica spheres with a diameter of 350 nm and a shell
thickness of approximately 10 nm were synthesized by a hydrothermal method using PMMA
hollow particles as template. Through the hydrolysis of TEOS, a continuous and uniform coating of
SiO2 was deposited over the surface of PMMA cores to form the core-shell structures. After
calcining to remove the template, a pure hollow silica structure with holes in the shells was
obtained. The as-prepared hollow products were characterized with TEM, SEM, EDS, BET and
FT-IR. Its large surface area and hollow morphology will make this new material a promising agent
for the applications of catalysts, controlled drug delivery and etc.
Abstract: The carbon nanotube/PMMA/PVAc composite film was prepared by solution casting.
The carbon nanotube (CNT) and graphitized carbon nanotube (GCNT) were employed as
conductive fillers in the composite films. The conductivity of the GCNT/PMMA/PVAc film is
better than that of CNT/PMMA/PVAc film. The electrical percolation thresholds were at 5wt% and
2wt% respectively in the CNT/PMMA/PVAc film and GCNT/PMMA/PVAc film. The volume
electric resistivities of CNT/PMMA/PVAc and GCNT/PMMA/PVAc composite film are at
0.044⋅m and 0.007⋅m respectively at 15wt% carbon nanotube. The significant difference of
resistivity for the both types of composite film was due to different structure and crystallinity of
CNT and GCNT.
Abstract: The microwave permittivity of multi-walled carbon nanotubes blended in paraffin wax
has been studied in the frequency range from 2 to 18GHz. The dissipaton factors of the
multi-walled carbon nanotubes are high at the microwave frequencies. The microwave permittivity
of the multi-walled carbon nanotubes and paraffin wax (or other dielectric materials) composites
can be tailored by the content of the carbon nanotubes. And ε′, ε″and tgδ of the composites increase
with the volume filling factor (v) of the carbon nanotubes. The ε′ and ε″ of the multi-walled carbon
nanotubes decrease with frequency in the frequency range from 2 to18 GHz. This property is very
good for broadband radar absorbing materials. The classical effective medium functions can not
effectively model the microwave permittivities of the composites containing multi-walled carbon
nanotubes. The ε′ and ε″ can be effectively modeled using second-order polynomials (ε′,
ε″=Av2+Bv+C). The high ε″ and dissipation factor tgδ (ε″/ε′) of multi-walled carbon nanotubes are
due to the dielectric relaxation. The carbon nanotubes composites would be a good candidate for
microwave absorbing material electromagnetic interface (EMI) shielding material.
Abstract: To prepare stable electrophoretic ink (E Ink) contains titanium dioxide particles, oil
soluble red, dispersant and tetrachloroethylene (TCE), the modification of organic and inorganic
material onto the particle surface was investigated. Modified particles were characterized by
measurement of X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared
spectroscopy (FT-IR) to confirm the composites and structures. The electrophoretic properties of
sample in TCE were investigated by static sedimentation experiment and electrophoresis instrument.
The type of inorganic and organic materials used for the surface modification influence
dispersibility and charge property of particles. On the whole, organic modified particles especially
modified by anionic surfactant show better properties. The process conditions were investigated in
detail using SDBS as the modifier. The dispersibility and charge property have significantly
improved in optimized modifying condition that the proportion of surfactant is 15%, pH is 6 and
reaction time is 1 hour which means SDBS modified TiO2 is suitable for electrophoretic particles.
Abstract: Nanoparticles of metastable copper nitride(Cu3N) have been successfully fabricated from
Cu mask using Ar ion ‘transcription method’ which is firstly invented by B.-S. Xu, C. Iwamoto and
S.-I. Tanaka in 1996 . The structural and morphological changes with irradiation time are studied
by transmission electron microscopy (TEM). The thin film-like crystalline Cu3N which is covered
with amorphous or polycrystalline cuprite (Cu2O) layer in the as-received Cu mask plays a role of
target. Polycrystalline Cu3N nanoparticles nucleate and grow up to the average size of 15nm after 30
sec-irradiation. Coalesence of 50nm-sized grown Cu3N nanoparticles forms polycrystalline thin film
after 2min-irradiation and its growth behavior follows Volmer-Weber mode. As irradiation time
increases from 30 sec to 15 min, Cu3N nanoparticles are thought to be grown preferentially along the
 and  directions. Cu2O still remain with Cu3N after 15 min.-irradiation.
Abstract: Nanoscale singularity at the reactive wetting front on the 6H-SiC (0006) surface with
amorphous oxide layer was studied using video recorded in situ to clarify the dynamic atomistic
behaviors of the brazing and the molten tip spreading on a high-temperature stage of a high-resolution
transmission electron microscope. A 0.5-nm-thick precursor film spreading ahead of the main molten
alloy on SiC (0006) at 1073 K and continuous spreading of the molten alloy were clearly observed on
the SiC (0006) surface with a less than 1-nm-thick amorphous layer. Molten Ti and TiC nanolayers
preceded the Ti5Si3 nanolayer at the tip and they traveled continuously at a velocity of 14 nm/sec on
the plane perpendicular to SiC (0006). Since Ti atoms in the molten alloy diffuse sufficiently rapidly
on the SiC surface to the tip, the formation of these layers may be the rate-determining step of
spreading. Discontinuous spreading of the precursor tip on SiC (0006) with a thick amorphous film
was observed in contrast to the continuous spreading on SiC with a thin film. This suggests that the
spreading of the Ti molten alloy on SiC is also controlled by the dissolution of the amorphous layer.
Abstract: This paper aims at a simple preparation method of nanocrystalline copper powders
through copper sulfate reduction by potassium borohydride in aqueous solution. The product
powders obtained in various conditions were investigated by X-ray powder diffraction, transmission
electron microscope and particle size distribution analyzer. The parameters that influence the
preparation process of copper crystalline were researched, such as the effect of complexing agent,
the molar ratio of copper sulfate to potassium borohydride and the quantity of protective polymer.
Finally, the preferable reaction conditions were determined, and well-dispersed nanocrystalline
copper powders with average diameter of 28.4nm were obtained.
Abstract: By overcoming less excitation efficiency of rare-earth ions due to small oscillator strength
(∼10-6) of f-f transition, Eu3+ ions were intentionally introduced to nano-sized semiconductor of tin
oxide (SnO2) in silica (SiO2)matrix via a sol-gel route. As a consequence, the excitation energy was
significantly absorbed by the nano-sized SnO2 with controlled band-gap energy owing to quantum
size effect (QSE) and subsequently transferred from nano-sized SnO2 to the Eu3+ ions doped,
resulting in the enhancement of Eu3+ red emission (external quantum efficiency : 75.6 %).