ORCID Profile
0000-0002-9755-1647
Current Organisation
Beijing Institute of Technology
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Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR02191J
Abstract: La-doped p-type ZnO nanofibers were successfully synthesized by electrospinning, followed by calcination. The microstructure and morphology of the La-doped ZnO nanofibers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The field effect curve of in idual nanofibers confirms that the resulting La-doped ZnO fibers are p-type semiconductors. The doping mechanism is discussed. Furthermore, crossed p-n homojunction nanofibers were also prepared based on electrospun La-doped p-type ZnO and n-type pure ZnO fibers. The current-voltage curve shows the typical rectifying characteristic of a p-n homojunction device. The turn-on voltage appears at about 2.5 V under the forward bias and the reverse current is impassable.
Publisher: Wiley
Date: 14-11-2006
Publisher: American Chemical Society (ACS)
Date: 09-03-2023
Publisher: American Chemical Society (ACS)
Date: 14-07-2006
DOI: 10.1021/JP061874W
Abstract: In this paper, we report the large-scale synthesis of ZnO nanoplatelets as thin as 10 nm. The nanoplatelets show higher efficiency in photodegrading organic dyes than ZnO nanorods do, and for the nanoplatelets, the thinner they are, the higher the performance. The photocatalytic decomposition of organic dyes (eosin B) by ZnO nanoplatelets compares favorably to the performances of ZnS porous nanoparticles and commercial Degussa P25 titania particles. This finding may have significant implications in the environment remediation and the fabrication of functional nanodevices.
Publisher: American Chemical Society (ACS)
Date: 09-03-2007
DOI: 10.1021/JP068792S
Publisher: AIP Publishing
Date: 19-03-2007
DOI: 10.1063/1.2716242
Abstract: Sixfold symmetry heptapodlike and threefold symmetry tetrapodlike ZnS structures have been fabricated by thermal evaporation of a ZnS and SiO mixture source in N2 at 1300°C. Both the heptapods and tetrapods have been formed by the self-assembly of ZnS nanowires with the preferred (0001) orientations. Structures and morphologies of the obtained heptapods and tetrapods are thoroughly studied using x-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. Room-temperature photoluminescence spectra taken from the nanostructures show a strong green emission centered at 550nm.
Publisher: Wiley
Date: 20-07-2006
Publisher: Wiley
Date: 03-02-2006
Publisher: Wiley
Date: 17-09-2007
Publisher: American Chemical Society (ACS)
Date: 05-11-2008
DOI: 10.1021/CM802516U
Publisher: American Scientific Publishers
Date: 2009
Abstract: Core/shell nanospheres of Ge/SiO2 and Ge/CdS have been synthesized by a simple thermal evaporation method using Ge, SiO or Ge, CdS as source materials. The synthesized products were characterized in detail using scanning electron microscope, transmission electron microscope as well as energy dispersive X-ray spectrometer. This simple synthesis technique not only provides a technique to protect Ge nanocrystals from oxidation, to form core/shell composite spheres, but also opens a new route to prepare core/shell spheres of a variety of semiconducting materials, such as core/shell Ge/ZnS nanospheres, ZnS/SiO2 nanospheres, etc., by a judicious choice of source materials.
Publisher: Wiley
Date: 18-11-2013
Publisher: Wiley
Date: 06-04-2007
Publisher: American Chemical Society (ACS)
Date: 27-09-2008
DOI: 10.1021/JP806334K
Publisher: American Chemical Society (ACS)
Date: 24-05-2007
DOI: 10.1021/JP071556C
Publisher: American Chemical Society (ACS)
Date: 19-07-2008
DOI: 10.1021/JP8039687
Publisher: AIP Publishing
Date: 12-02-2007
DOI: 10.1063/1.2539821
Abstract: The authors reported on the structural analysis of hierarchical Zn3P2∕ZnS nanotube/nanowire heterostructures, which were synthesized by a one-step thermochemical process. The structural analyses by several techniques show that the stem and the branches in the heterostructures have the epitaxial relations as [010]Zn3P2‖[12¯10]ZnS and (101)Zn3P2‖(0002)ZnS. Cathodoluminescence of the heterostructures was also investigated, which shows strong green emissions centered at approximately 510 and 600nm.
Publisher: Wiley
Date: 27-03-2006
Abstract: This article describes a simple thermal-decomposition/nitridation method for the large-scale synthesis of 1D alpha-Si(3)N(4) nanostructures, such as millimeter-scale microribbons, nanosaws, nanoribbons, and nanowires. These nanostructures are systematically investigated by checking the product deposited at different areas by using powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and electron energy loss spectroscopy. Studies show that all these nanostructures have a single-crystalline nature and predominantely grow along the [011] direction. These 1D nanostructures are formed by thermal decomposition, followed by the nitridation of SiO.
Publisher: American Chemical Society (ACS)
Date: 02-09-2006
DOI: 10.1021/JP057312E
Abstract: Unconventional zigzag indium phosphide (InP) single-crystalline and twinned nanowires were produced via thermal evaporation of indium phosphide in the presence of zinc selenide. The structure and morphology of the as-synthesized products were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Studies found that two type of nanowires exist in the products, namely, the periodic-rhombus-decorated single-crystalline InP (type I) nanowires and jagged twinned InP (type II) nanowires. Both of them have preferential 111 growth directions. The optical properties were also investigated at room temperature, and they show that the nanowires display a strong emission at approximately 750 nm, which is quite different from that observed in all previous reports related to the InP nanostructures.
Publisher: American Chemical Society (ACS)
Date: 11-02-2006
DOI: 10.1021/JP056783Y
Abstract: One-dimensional ZnO nanostructures with different morphologies have been successfully synthesized through a simple round-to-round metal vapor deposition route at 550 degrees C with a zinc powder covered indium film as the source material. The structures and morphologies of the products were characterized in detail by using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Studies found that the morphology of the products can be easily tuned from one experimental round to another. Possible growth mechanisms for the formation of one-dimensional ZnO nanostructures with different morphologies are discussed. Photoluminescence studies show that there are sharp UV emission and broad defect-related green emissions for the products obtained in all experimental rounds. Relative intensity of the UV emission to defect-related emissions gradually increased from one experimental round to another.
Publisher: American Chemical Society (ACS)
Date: 15-10-2008
DOI: 10.1021/CM802042K
Publisher: Wiley
Date: 19-07-2021
Abstract: Owing to their cost‐effectiveness and high energy density, sodium‐ion batteries (SIBs) and potassium‐ion batteries (PIBs) are becoming the leading candidates for the next‐generation energy‐storage devices replacing lithium‐ion batteries. In this work, a novel Fe x −1 Se x heterostructure is prepared on fungus‐derived carbon matrix encapsulated by 2D Ti 3 C 2 T x MXene highly conductive layers, which exhibits high specific sodium ion (Na + ) and potassium ion (K + ) storage capacities of 610.9 and 449.3 mAh g −1 at a current density of 0.1 A g −1 , respectively, and excellent capacity retention at high charge–discharge rates. MXene acts as conductive layers to prevent the restacking and aggregation of Fe x −1 Se x sheets on fungus‐derived carbonaceous nanoribbons, while the natural fungus functions as natural nitrogen/carbon source to provide bionic nanofiber network structural skeleton, providing additional accessible pathways for the high‐rate ion transport and satisfying surface‐driven contribution ratios at high sweep rates for both Na/K ions storages. In addition, in situ synchrotron diffraction and ex situ X‐ray photoelectron spectroscopy measurements are performed to reveal the mechanisms of storage and de‐/alloying conversion process of Na + in the Fe x −1 Se x /MXene/carbonaceous nanoribbon heterostructure. As a result, the assembled Na/K full cells containing MXene‐supported Fe x −1 Se x @carbonaceous anodes possess stable large‐ion storage capabilities.
Publisher: Wiley
Date: 23-11-2012
Abstract: Highly flexible stacked and in-plane all-solid-state supercapacitors are fabricated on 3D hierarchical GeSe2 nanostructures with high performance, and, when configured as a self-powered photodetector nanosystem, can be used to power CdSe nanowire photodetectors.
Publisher: American Chemical Society (ACS)
Date: 08-2007
DOI: 10.1021/JP073928N
Publisher: American Chemical Society (ACS)
Date: 24-10-2006
DOI: 10.1021/JP064537W
Abstract: SiO(2) nanotubes with tunable diameters and lengths have been successfully synthesized via a simple in situ templatelike process by thermal evaporation of SiO, ZnS, and GaN in a vertical induction furnace. The structure and morphologies were systematically investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectrometry. Studies found that both the diameters and lengths of the SiO(2) nanotubes can be effectively tuned by simply changing the reaction temperatures. The range of changes was from 30 nm (diameter) and several hundred micrometers (length) at 1450 degrees C to 100 nm (diameter) and 2-10 micrometers (length) at 1300 degrees C. Varying some other experimental parameters results in the formation of additional SiO(2)-based nanostructures, such as core-shell ZnS-SiO(2) nanocables, ZnS nanoparticle filled SiO(2) nanotubes, and fluffy SiO(2) spheres. Based on the observations, an in situ templatelike process was proposed to explain the possible growth mechanism.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3EE41139G
Publisher: American Chemical Society (ACS)
Date: 23-09-2006
DOI: 10.1021/JP064246N
Abstract: Single-crystalline ZnS nanowires coated with graphitic carbon shells were synthesized by thermal evaporation of a mixture of ZnS and SnS powders in a graphite crucible. As-synthesized ZnS/C nanostructures were characterized using X-ray diffraction, scanning electron microscope, and transmission electron microscopy equipped with an energy-dispersive X-ray spectrometer. The ZnS core nanowires were formed by a Sn-catalytic vapor-liquid-solid process and grew along the [210] directions. Photoluminescence spectrum reveals that the carbon-coated ZnS nanowires have a strong emission band centered at 586 nm and a shoulder band at 645 nm.
Publisher: Springer Science and Business Media LLC
Date: 12-12-2007
Publisher: AIP Publishing
Date: 27-02-2006
DOI: 10.1063/1.2182065
Abstract: We report on the direct fabrication of single-crystalline wurtzite-type hexagonal GaN nanotubes via a newly designed, controllable, and reproducible chemical thermal-evaporation process. The nanotubes are single crystalline, have one end closed, an average outer diameter of ∼300nm, an inner diameter of ∼100nm, and a wall thickness of ∼100nm. The structure and morphology of the tubes are characterized using a scanning electron microscope and a transmission electron microscope. The cathodoluminescence of in idual nanotubes is also investigated. The growth mechanism, formation kinetics, and crystallography of GaN nanotubes are finally discussed.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1JM14551G
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B701113J
Abstract: Silicon nanowires assembled in micro-sized semispheres were synthesized through simple thermal evaporation without using any templates and metal particle catalysts electron microscopy revealed that the nanowires within semisphere ensembles are well-aligned and evenly distributed a typical nanowire array density was of approximately 4 x 10(9) cm(-2) field-emitting characteristics of the arrays were analyzed.
Publisher: AIP Publishing
Date: 20-03-2006
DOI: 10.1063/1.2186980
Abstract: Self-assembled three-dimensional (3D) dandelionlike ZnS structures have been successfully synthesized by a simple thermochemical process using ZnS and Ge powders as the source material. The as-synthesized dandelionlike structures consist of radially aligned ZnS submicrotubes with well-faceted hexagonal cross sections, which are formed by the coalescence of neighboring ZnS nanowires. A two-step self-assembly process was proposed to explain the formation mechanism. The as-synthesized 3D dandelionlike ZnS structures show strong green emission centered at about 550nm as well as a weak emission at 720nm.
Publisher: American Chemical Society (ACS)
Date: 18-03-2006
DOI: 10.1021/JP060006W
Abstract: Novel hierarchical heterostructures formed by wrapping ZnS nanowires with highly dense SiO(2) nanowires were successfully synthesized by a vapor-liquid-solid process. The as-synthesized products were characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy equipped with an energy-dispersive X-ray spectrometer. Studies indicate that a typical hierarchical ZnS/SiO(2) heterostructure consists of a single-crystalline ZnS nanowire (core) with diameter gradually decreasing from several hundred nanometers to 20 nm and adjacent amorphous SiO(2) nanowires (branches) with diameters of about 20 nm. A possible growth mechanism was also proposed for the growth of the hierarchical heterostructures.
Publisher: American Chemical Society (ACS)
Date: 09-02-2007
DOI: 10.1021/JP067691R
Publisher: American Chemical Society (ACS)
Date: 07-12-2006
DOI: 10.1021/CG060224E
Publisher: American Scientific Publishers
Date: 02-2007
DOI: 10.1166/JNN.2007.120
Abstract: Adopting a wet chemistry method, Au and Fe 3 O 4 nanoparticles were functionalized on boron nitride nanotubes (BNNTs) successfully for the first time. X-ray diffraction pattern and transmission electron microscopy were used to characterize the resultant products. Subsequently, a method was proposed to fabricate heterojunction structures based on the particle-functionalized BNNTs. As a demonstration, BNNT-carbon nanostructure, BNNT-ZnO and BNNT-Ga 2 O 3 junctions were successfully fabricated using the functionalized particles as catalysts.
Publisher: AIP Publishing
Date: 12-06-2001
DOI: 10.1063/1.2208933
Abstract: Cubic structured nanosprings, InP nanosprings, have been synthesized via a simple thermochemical process using InP and ZnS as the source materials. Each InP nanospring is formed by rolling up a single InP nanobelt with the growth direction along the ⟨111⟩ orientation. The formation of these novel nanostructures is mainly attributed to the minimization of the electrostatic energy due to the polar charges on the ±(002) side surfaces of cubic InP. Cathodoluminescence properties were also studied, which reveal that the InP nanosprings have three emission bands centered at ∼736, ∼920, and ∼980nm.
Publisher: Springer Science and Business Media LLC
Date: 09-04-2013
DOI: 10.1038/SREP01622
Publisher: American Chemical Society (ACS)
Date: 18-05-2006
DOI: 10.1021/JP0618274
Abstract: Through the use of commercial graphite powders as the carbon sources, a variety of interesting tubular carbon nano- and microstructures, such as networked carbon nanotubes, aligned carbon microtubes with hexagonal cross-sections, aligned tapered carbon tubes, and hollow carbon microhorns, have been successfully synthesized. As-grown tubular carbon structures were characterized using scanning electron microscopy, transmission electron microscopy, and X-ray energy-dispersive spectroscopy. An in situ template mechanism was proposed to explain the possible growth process. The vibrational properties of the synthesized tubular carbon structures were also studied by Raman spectroscopy.
Publisher: American Chemical Society (ACS)
Date: 13-04-2010
DOI: 10.1021/JP100942M
Publisher: IOP Publishing
Date: 20-06-2006
DOI: 10.1088/0957-4484/17/14/019
Abstract: Single-crystalline bamboo-like beta-SiC nanowires with hexagonal cross-sections were synthesized by thermal evaporation of mixed SiO+C+GaN powders in an Ar atmosphere. The as-synthesized nanowires were studied by x-ray diffraction, scanning electron microscopy and transmission electron microscopy. Studies found that the as-synthesized SiC nanowires are composed of hexagonal stems decorated with larger diameter knots along their whole length with the [Formula: see text] growth direction. The growth of bamboo-like SiC nanowires is governed by the vapour-liquid-solid mechanism. Field-emission properties of the peculiar nanostructures were also explored, showing a turn-on field of about 10.1 V microm(-1).
Location: China
No related grants have been discovered for Guozhen Shen.