Optical properties of PbS nanocrystal quantum dots at ambient and elevated pressure

2014 ◽  
Vol 16 (18) ◽  
pp. 8515-8520 ◽  
Author(s):  
Kaifu Bian ◽  
Benjamin T. Richards ◽  
Hanqing Yang ◽  
William Bassett ◽  
Frank W. Wise ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Optical Absorption ◽  
Diamond Anvil Cell ◽  
Elevated Pressure ◽  
Optical Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanocrystal Quantum Dots ◽  
Diamond Anvil

We investigated pressure-dependent changes in the optical properties of PbS nanocrystal quantum dots (NQD) by combining X-ray scattering and optical absorption spectroscopy in a diamond anvil cell.

Inelastic x-ray scattering from high pressure fluids in a diamond anvil cell

2009 ◽  
Vol 94 (7) ◽  
pp. 074102 ◽  
Author(s):  
F. A. Gorelli ◽  
M. Santoro ◽  
T. Scopigno ◽  
M. Krisch ◽  
T. Bryk ◽  
...  
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
X Ray ◽  
X Ray Scattering ◽  
Diamond Anvil ◽  
Ray Scattering

Momentum-resolved resonant inelastic X-ray scattering on a single crystal under high pressure

2013 ◽  
Vol 21 (1) ◽  
pp. 131-135 ◽  
Author(s):  
Masahiro Yoshida ◽  
Kenji Ishii ◽  
Ignace Jarrige ◽  
Tetsu Watanuki ◽  
Kazutaka Kudo ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Diamond Anvil Cell ◽  
Ambient Pressure ◽  
Electronic Excitations ◽  
X Ray ◽  
X Ray Scattering ◽  
Angle Condition ◽  
Diamond Anvil ◽  
Ray Scattering

A single-crystal momentum-resolved resonant inelastic X-ray scattering (RIXS) experiment under high pressure using an originally designed diamond anvil cell (DAC) is reported. The diamond-in/diamond-out geometry was adopted with both the incident and scattered beams passing through a 1 mm-thick diamond. This enabled us to cover wide momentum space keeping the scattering angle condition near 90°. Elastic and inelastic scattering from the diamond was drastically reduced using a pinhole placed after the DAC. Measurement of the momentum-resolved RIXS spectra of Sr2.5Ca11.5Cu24O41at the CuK-edge was thus successful. Though the inelastic intensity becomes weaker by two orders than the ambient pressure, RIXS spectra both at the center and the edge of the Brillouin zone were obtained at 3 GPa and low-energy electronic excitations of the cuprate were found to change with pressure.

A compact system for generating extreme pressures and temperatures: An application of laser-heated diamond anvil cell to inelastic X-ray scattering

2013 ◽  
Vol 84 (11) ◽  
pp. 113902 ◽  
Author(s):  
Hiroshi Fukui ◽  
Takeshi Sakai ◽  
Tatsuya Sakamaki ◽  
Seiji Kamada ◽  
Suguru Takahashi ◽  
...  
Keyword(s):  
Diamond Anvil Cell ◽  
X Ray ◽  
X Ray Scattering ◽  
Diamond Anvil ◽  
Laser Heated ◽  
Ray Scattering

scholarly journals Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
A. S. J. Méndez ◽  
F. Trybel ◽  
R. J. Husband ◽  
G. Steinle-Neumann ◽  
H.-P. Liermann ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Diamond Anvil

Energy Band Gap Studies of CdS Nanomaterials

2008 ◽  
Vol 3 ◽  
pp. 97-102 ◽  
Author(s):  
Dinu Patidar ◽  
K.S. Rathore ◽  
N.S. Saxena ◽  
Kananbala Sharma ◽  
T.P. Sharma
Keyword(s):  
Optical Absorption ◽  
Band Gap ◽  
Energy Band ◽  
Chemical Method ◽  
Optical Absorption Spectroscopy ◽  
Cds Nanoparticles ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
X Ray ◽  
Simple Chemical

The CdS nanoparticles of different sizes are synthesized by a simple chemical method. Here, CdS nanoparticles are grown through the reaction of solution of different concentration of CdCl2 with H2S. X-ray diffraction pattern confirms nano nature of CdS and has been used to determine the size of particle. Optical absorption spectroscopy is used to measure the energy band gap of these nanomaterials by using Tauc relation. Energy band gap ranging between 3.12 eV to 2.47 eV have been obtained for the samples containing the nanoparticles in the range of 2.3 to 6.0 nm size. A correlation between the band gap and size of the nanoparticles is also established.

PHASE TRANSITION IN LAYERED PEROVSKITE LIKE MANGANATE Ca3Mn2O7 UNDER HIGH PRESSURE

2001 ◽  
Vol 15 (18) ◽  
pp. 2491-2497 ◽  
Author(s):  
J. L. ZHU ◽  
L. C. CHEN ◽  
R. C. YU ◽  
F. Y. LI ◽  
J. LIU ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Diamond Anvil Cell ◽  
The Other ◽  
Layered Perovskite ◽  
X Ray Diffraction ◽  
Two Phase ◽  
X Ray ◽  
Diamond Anvil

In situ high pressure energy dispersive X-ray diffraction measurements on layered perovskite-like manganate Ca 3 Mn 2 O 7 under pressures up to 35 GPa have been performed by using diamond anvil cell with synchrotron radiation. The results show that the structure of layered perovskite-like manganate Ca 3 Mn 2 O 7 is unstable under pressure due to the easy compression of NaCl-type blocks. The structure of Ca 3 Mn 2 O 7 underwent two phase transitions under pressures in the range of 0~35 GPa. One was at about 1.3 GPa with the crystal structure changing from tetragonal to orthorhombic. The other was at about 9.5 GPa with the crystal structure changing from orthorhombic back to another tetragonal.

Study of CdSe/CdS quantum dots in solutions and gels by small-angle X-ray scattering

2011 ◽  
Vol 5 (1) ◽  
pp. 126-133 ◽  
Author(s):  
N. B. Simonova ◽  
F. V. Tuzikov ◽  
R. N. Khramov ◽  
N. A. Tuzikova ◽  
M. F. Tuzikov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Small Angle ◽  
Cds Quantum Dots ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Synchrotron X-ray diffraction tomography technique using diamond anvil cell

2011 ◽  
Vol 67 (a1) ◽  
pp. C113-C113
Author(s):  
H. Liu ◽  
L. Wang ◽  
Z. Yu ◽  
L. Kong ◽  
J. Zhao ◽  
...  
Keyword(s):  
Diamond Anvil Cell ◽  
Diffraction Tomography ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diamond Anvil
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