Publication Date (Web): December 30, 2011 (Review)
Celluar seeding of the bioartificial myocardial tissue patch: (A) Arrangement of cells in 3D collagen structure; (B) Junction between cellular body and collagen fibril, demonstrated by electron microscopy(x8000); (C) Collagen fibrils are embedded in amorphous collagen matrix (x63000); (D) cells attach along collagen fibrils and are distributed homogenously even in deeper layers of the bioartificial myocardial tissue patch (MF-20 stain) .
Thresholding process of image analysis of LDI-glycerol-PEG-AA polymer foam: (A) Initial SEM image; (B) thresholding SEM image; (C) labeled pores of an SEM image of LDI-glycerol-PEG-AA polymer foam .
Scanning electron microscope images of poly(DL-lactide-co-glycolide) nanofibers at 5000x magnification (a) and 30 000x magnification (b). The polymer fiber diameter was slightly variable with a mean diameter of approximately 100 nm .
Scanning electron micrographs of a PLLA nanofibrous scaffold prepared from 2.5% PLLA/THF solution at a phase separation temperature of 8 Celsius: (A) 500% (B) 20,000% .
Examples of static self-assembly: (A) An array of millimeter-sized polymeric plates assembled at a water/perfluorodecalin interface by capillary interactions . (B) A 3D aggregate of micrometer plates assemble by capillary forces .
Similarity between native ECM protein structure and electrospun polymeric nanofiber matrix: (a) Fibroblasts cultured on collagen fibrils of rat cornea ; (b) endothelial cells cultured on electrospun PCL nanofiber matrix .
Connexin 43 gap junction protein was found between cardiomyocytes in the nanowire-containing scaffolds (green dots indicated by white arrows). Nuclei are coloured in blue, B is amplification of A .
Publication Date (Web): December 30, 2011 (Article)
Showing the experimental setup stage 1: making gold nanoparticles; stage 2: reducing the size of AU NPs by lasertreatment; stage 3: making copper nanoparticles; and stage 4: reducing Cu NPs colloid particle size.
Using an equal volume mixture of monometallic NP colloids from stages 2 and 4 to make Au Cu alloy NPs with andwithout stirring.
Laser beam profile during exposure near Gaussian.
Variation of laser output power with voltage wasdetermined in order to ensure experiments were carried outin the linear region.
Variation in the concentration of copper NPs as thestirring speed is changed.
Absorption spectra of Cu colloids synthesized by LAT in acetone on the various laser fluencies.
Variation of NP concentration, taken to be propor-tional to spectral absorption, with durations of combinedstirring and irradiation at stage 4 of Fig. 1.
TEM image of Gold (left) and Copper (right) nanoparticles with insets showing the particle size distribution asdiameter (nm) against count.
AuCu alloy NPs made by laser irradiation of colloid mixture containing Au and Cu NPs. (a) and (b) show TEMimage of alloy NPs and inset shows core-shell structure, (c) shows electron diffraction pattern and (d) shows size distribution.
X-ray diffraction pattern of AuCu alloy formed atstages 5 and 6 of figure 2.
UV-Vis absorption spectra for single metal andAuCu alloy produced by laser irradiation of a mixture of single element colloids containing Au and Cu respectively.More alloys were formed in half the time when the colloidmixture was stirred during irradiation.
XRF pattern for Au Cu nanoalloy produced at stage 6.
Publication Date (Web): December 2, 2011 (Article)
Planar and three-dimensional model of SWCNT.
A novel model for SWCNT under the cylindrical co-ordinate system, point A corresponding to the central atom, and point B, C, D corresponding to the neighboring atoms.
Diagram of the chiral vector (n, m) for SWCNT, rolled up from a graphene.
Schematic of atomic structure of graphene.
Carbon atoms i, j and k, the corresponding bonds i-j and i-k, and bond angle.
(a.1) Illustration of differences among three bond lengths for zigzag-type SWCNT; (a.2) Illustration of differences among three bond angles for zigzag-type SWCNT; (b.1) Illustration of differences among three bond lengths for armchair- type SWCNT; (b.2) Illustration of differences among three bond angles for armchair -type SWCNT; (c.1) Illustration of differences among three bond lengths for chiral SWCNT; (c.2) Illustration of differences among three bond angles for chiral SWCNT.
Relative errors are compared with results  in bond lengths and bond angles by considering the non-planar ge-ometry factor respectively.
Relation curve between curvature value and the potential energy of a C atom with three different types of SWCNT.
The relationship curve between fractal dimension for armchair topology from the numbers of the Y-branched junctions along the axial direction and the numbers of the Y-branched junctions along the circumferential direction.
The relationship curve between fractal dimension for zigzag topology from the numbers of the Y-branched junctions along the xial direction and the numbers of the Y-branched junctions along the circumferential direction.
Publication Date (Web): December 19, 2011 (Article)
Figure 1 (a) SEM picture of TiO2 nanotubes unhinged from the polycarbonate template, (b) SEM picture close up of some nanotubes showing their thin walls.
Figure 2 XRD diffraction patterns of the annealed TiO2-nanotubes showing the different heat exposure times; R=Rutile and A=Anatase.
Figure 3 Calcination time and resulting anatase/rutile ratio present in the TiO2 nanotubes at an annealing temperature of 583°K at air ambient.
Figure 4 UV-Vis spectra of methylene-blue degradation after treatment with mixed phase TiO2 nanotubes.
Figure 5 Effect of methylene-blue degradation using mixed phase TiO2 nanotubes.
Figure 6 (a) Band charge diagram of mixed phase TNTs with rutile working as an photonic antenna. Illustration of the rutile/anatase contact area to compare particle based (b)and nanotube based (c) mixed phase photo catalysts.
Publication Date (Web): December 30, 2011 (Article)
(A) XRD patterns of the nanotrees of crystalline Ni prepared with (a) and without (b) 1.5 g ploy(vinyl pyrrolidone) (PVP) introduced. Energy-dispersive X-ray spectrum (EDS) images of the Ni nanotree crystals prepared with (B) and without (C) PVP introduced. (B1), (B2) and (B3) show SEM images and the corresponding EDS mapping of the elemental distribution of Ni in nanotrees prepared with PVP introduced. (C1), (C2) and (C3) show SEM image and the corresponding EDS mapping of the elemental distribution of Ni, and O in nanotrees prepared without PVP introduced.
Thermogravimetric analysis of the nanotrees of crystalline Ni prepared without (a) and with (b) 1.5 g PVP introduced.
M-H hysteresis loops (at 300 K) of the Ni nanotrees synthesized without (a) and with (b) 1.5g PVP introduced.
SEM images and the corresponding schematic of the single Ni nanotree prepared with ((A), (a)) and without ((B), (b)) 1.5 g PVP introduced via electrolytic process. SEM images and the corresponding schematic of the single Ni nanotree prepared at higher voltage ((C), (c)) and lower voltage ((D), (d)) during electrolytic process.
(a) TEM and (b) HRTEM images of silica sol particles aged for 5 hours at room temperature, 25oC; (c) schematic illustration of gel network structure showing the pore and particle sizes (Courtesy from ref. ).
X-ray diffraction (XRD) pattern of SiO2 gel powder at room temperature (~25oC) indicating the amorphous nature of the gel under study. The insets shows the SEM micrographs of SiO2:Eu gels prepared at (a) atmosphere pressure (1 bar) and 50oC; and (b) 120 bars and 150oC, respectively.
XPS survey scan spectra of sputtered and nanoparticles of SiO2:Eu3+ recorded with photon energy of AlKalpha (hv = 1486.6 eV), Inset shows the Si(2P) core level.
Absorbance spectra of Eu doped-SiO2 samples prepared at atmosphere pressure (1 bar) and 120 bars and 150oC, respectively. Inset shows the expanded version of the absorption peaks.
PLE and PL spectra of SiO2:Eu gels made at (a) 50oC, 1 bar and (b) 120 bars and 150oC, respectively. Inset shows the mechanism of Eu3+ transitions.
Nano-Micro Letters, September 2011, Volume 3, Issue 3, pp 146-152
Publication Date (Web): September 1, 2011 (Article)
Schematic illustration of SWNTs strands align on silicon substrate by the shear force of solvent evaporation(a-d): (a) a layer of photoresist resin is coating on the silicon wafer surface, and (b) photoresist resin grooves with rectangular cross section were fabricated by using standard photolithographic methods, then (c) a drop of SWNTs suspension was introduced into the microchannels. As the suspension evaporating, the capillary force can stretch and align carbon nanotubes one by one into a nanoscale strand (d). (e) Mechanism of the SWNTs strands aligning in the mirochannel.
FESEM images of SWNTs aligned in photoresis microchannels after one-time alignment. Some of the SWNTs are difficult to link each other into a continuous strand (identified by write arrow in "b"), and the others are connected one by one (identified by black arrow in "c"). (Magnification a: 6,000; b: 12,000; c: 55,000).
FESEM images of SWNTs strands on substrate with twice process after remove of photoresist resin. Continuous nanoscale diameter SWNTs strands are aligned on the substrate of microchannels uniformly and each SWNT is connected to other end to end. (Magnification a: 6,000; b: 11,000; c: 19,000).
FESEM images of SWNTs strands on substrate with thrice process after remove of photoresist patterns. The SWNTs strands show wider diameter and tangled patterns with some nanotubes attached to the side strands (identified by blank arrow in "a"). (Magnification a: 5,000; b: 11,000).
AFM images (a, c) and the height-distance curves (b, d) of SWNTs strands on the pattern electrodes (a, b: 8 um gap; c, d: 16 um gap).
I-V (a) and Id-Vg curves (b) of the CNTFET device fabricated with aligned SWNTs across two Au electrodes separated by 16 um gap. These SWNTs show a characteristic field effect p-type transistor behaviour.