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3D Hierarchical Bi2S 3 Nanostructures by Polyvinylpyrrolidone (PVP) and Chloride Ion-Assisted Synthesis and Their Photodetecting Properties.

Ding T, Dai J, Xu J, Wang J, Tian W, Huo K, Fang Y, Chen C - Nanoscale Res Lett (2015)

Bottom Line: A possible formation mechanism was also proposed on the basis of time-dependent experiments.The photoresponse properties show that the conductivity of Bi2S3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current.It is expected that hierarchical architectures Bi2S3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.

View Article: PubMed Central - PubMed

Affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China, dtthust@163.com.

ABSTRACT
A solvothermal method has been employed to synthesize bismuth sulfide (Bi2S3) with three-dimensional (3D) hierarchical architectures. The influences of different types of surfactants and Cl(-) species on the size and morphology were investigated. A possible formation mechanism was also proposed on the basis of time-dependent experiments. The photoresponse properties show that the conductivity of Bi2S3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current. The response and decay times are estimated to be 142 and 151 ms, respectively. It is expected that hierarchical architectures Bi2S3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.

No MeSH data available.


Related in: MedlinePlus

a, b Typical SEM images of V-Bi2S3. c, d TEM image and HRTEM image of V-Bi2S3, respectively
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Fig2: a, b Typical SEM images of V-Bi2S3. c, d TEM image and HRTEM image of V-Bi2S3, respectively

Mentions: Figure 2a, b are low- and high-magnification FE-SEM images, revealing flower-like Bi2S3 nanostructures are produced. The flower-like Bi2S3 nanostructures are composed of numerous nanowires with diameters of about 12 nm and length up to 1 μm. TEM images further reveal that the petals burst forth. The HRTEM image (Fig. 2d) reveals the lattice fringe of a nanowire with a regular spacing of 0.79 nm, corresponding to the (110) plane of orthorhombic Bi2S3.Fig. 2


3D Hierarchical Bi2S 3 Nanostructures by Polyvinylpyrrolidone (PVP) and Chloride Ion-Assisted Synthesis and Their Photodetecting Properties.

Ding T, Dai J, Xu J, Wang J, Tian W, Huo K, Fang Y, Chen C - Nanoscale Res Lett (2015)

a, b Typical SEM images of V-Bi2S3. c, d TEM image and HRTEM image of V-Bi2S3, respectively
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496417&req=5

Fig2: a, b Typical SEM images of V-Bi2S3. c, d TEM image and HRTEM image of V-Bi2S3, respectively
Mentions: Figure 2a, b are low- and high-magnification FE-SEM images, revealing flower-like Bi2S3 nanostructures are produced. The flower-like Bi2S3 nanostructures are composed of numerous nanowires with diameters of about 12 nm and length up to 1 μm. TEM images further reveal that the petals burst forth. The HRTEM image (Fig. 2d) reveals the lattice fringe of a nanowire with a regular spacing of 0.79 nm, corresponding to the (110) plane of orthorhombic Bi2S3.Fig. 2

Bottom Line: A possible formation mechanism was also proposed on the basis of time-dependent experiments.The photoresponse properties show that the conductivity of Bi2S3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current.It is expected that hierarchical architectures Bi2S3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.

View Article: PubMed Central - PubMed

Affiliation: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China, dtthust@163.com.

ABSTRACT
A solvothermal method has been employed to synthesize bismuth sulfide (Bi2S3) with three-dimensional (3D) hierarchical architectures. The influences of different types of surfactants and Cl(-) species on the size and morphology were investigated. A possible formation mechanism was also proposed on the basis of time-dependent experiments. The photoresponse properties show that the conductivity of Bi2S3 micro-flowers is significantly enhanced and the photocurrent is approximately two orders of magnitude larger than the dark current. The response and decay times are estimated to be 142 and 151 ms, respectively. It is expected that hierarchical architectures Bi2S3 may provide a new pathway to develop advanced nanomaterial for high-speed and high-sensitivity photoelectrical switches and photodetecting devices.

No MeSH data available.


Related in: MedlinePlus