scholarly journals Controlling the structures of organic semiconductor–quantum dot nanocomposites through ligand shell chemistry

Soft Matter ◽  
2020 ◽  
Vol 16 (34) ◽  
pp. 7970-7981
Author(s):  
Daniel T. W. Toolan ◽  
Michael P. Weir ◽  
Rachel C. Kilbride ◽  
Jon R. Willmott ◽  
Stephen M. King ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Organic Semiconductor ◽  
Small Angle ◽  
Organic Ligands ◽  
X Ray ◽  
Semiconductor Quantum Dot ◽  
Ligand Shell ◽  
Shell Chemistry ◽  
Nanocrystal Quantum Dots ◽  
Structural Insights

Structural insights via small angle X-ray and neutron (SAXS and SANS, respectively) into how nanocrystal quantum dots (QD) functionalized with organic ligands self-assemble with a small molecule organic semiconductor.

scholarly journals Observation of ordered organic capping ligands on semiconducting quantum dots via powder X-ray diffraction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jason J. Calvin ◽  
Tierni M. Kaufman ◽  
Adam B. Sedlak ◽  
Michelle F. Crook ◽  
A. Paul Alivisatos
Keyword(s):  
Quantum Dots ◽  
Colloidal System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ligand Shell ◽  
Scattering Factor ◽  
Organic Capping ◽  
Capping Ligands ◽  
Key Techniques ◽  
Inorganic Structure

AbstractPowder X-ray diffraction is one of the key techniques used to characterize the inorganic structure of colloidal nanocrystals. The comparatively low scattering factor of nuclei of the organic capping ligands and their propensity to be disordered has led investigators to typically consider them effectively invisible to this technique. In this report, we demonstrate that a commonly observed powder X-ray diffraction peak around $$q=1.4{\AA}^{-1}$$ q = 1.4 Å − 1 observed in many small, colloidal quantum dots can be assigned to well-ordered aliphatic ligands bound to and capping the nanocrystals. This conclusion differs from a variety of explanations ascribed by previous sources, the majority of which propose an excess of organic material. Additionally, we demonstrate that the observed ligand peak is a sensitive probe of ligand shell ordering. Changes as a function of ligand length, geometry, and temperature can all be readily observed by X-ray diffraction and manipulated to achieve desired outcomes for the final colloidal system.

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 A Study on an Organic Semiconductor-Based Indirect X-ray Detector with Cd-Free QDs for Sensitivity Improvement

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6562
Author(s):  
Jehoon Lee ◽  
Hailiang Liu ◽  
Jungwon Kang
Keyword(s):  
Quantum Dots ◽  
Indium Phosphide ◽  
Active Layer ◽  
Electron Acceptor ◽  
Organic Semiconductor ◽  
Environmental Problems ◽  
Hazardous Substances ◽  
X Ray ◽  
Sensitivity Improvement ◽  
Optimized Conditions

In this paper, we studied the optimized conditions for adding inorganic quantum dots (QD) to the P3HT:PC70BM organic active layer to increase the sensitivity of the indirect X-ray detector. Commonly used QDs are composed of hazardous substances with environmental problems, so indium phosphide (InP) QDs were selected as the electron acceptor in this experiment. Among the three different sizes of InP QDs (4, 8, and 12 nm in diameter), the detector with 4 nm InP QDs showed the highest sensitivity, of 2.01 mA/Gy·cm2. To further improve the sensitivity, the QDs were fixed to 4 nm in diameter and then the amount of QDs added to the organic active layer was changed from 0 to 5 mg. The highest sensitivity, of 2.26 mA/Gy·cm2, was obtained from the detector with a P3HT:PC70BM:InP QDs (1 mg) active layer. In addition, the highest mobility, of 1.69 × 10−5 cm2/V·s, was obtained from the same detector. Compared to the detector with the pristine P3HT:PC70BM active layer, the detector with a P3HT:PC70BM:InP QDs (1 mg) active layer had sensitivity that was 61.87% higher. The cut-off frequency of the P3HT:PC70BM detector was 21.54 kHz, and that of the P3HT:PC70BM:InP QDs (1 mg) detector was 26.33 kHz, which was improved by 22.24%.

Structural Insights of the Nucleotide-Dependent Conformational Changes of Thermotoga maritima MutL Using Small-Angle X-ray Scattering Analysis

2008 ◽  
Vol 145 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Tae Gyun Kim ◽  
Hyung Jin Cha ◽  
Hyung Ju Lee ◽  
Seong-Dal Heo ◽  
Kwan Yong Choi ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Small Angle ◽  
Thermotoga Maritima ◽  
X Ray ◽  
X Ray Scattering ◽  
Structural Insights ◽  
Ray Scattering

scholarly journals Structural Insights into the Mechanism of Formation of Cellulosomes Probed by Small Angle X-ray Scattering

2004 ◽  
Vol 279 (53) ◽  
pp. 55985-55994 ◽  
Author(s):  
Michal Hammel ◽  
Henri-Pierre Fierobe ◽  
Mirjam Czjzek ◽  
Stéphanie Finet ◽  
Véronique Receveur-Bréchot
Keyword(s):  
Small Angle ◽  
Mechanism Of Formation ◽  
X Ray ◽  
X Ray Scattering ◽  
Structural Insights ◽  
Ray Scattering

Structural Insights into the β-Xylosidase fromTrichoderma reeseiObtained by Synchrotron Small-Angle X-ray Scattering and Circular Dichroism Spectroscopy†

Biochemistry ◽  
2005 ◽  
Vol 44 (47) ◽  
pp. 15578-15584 ◽  
Author(s):  
Adriana L. Rojas ◽  
Hannes Fischer ◽  
Elena V. Eneiskaya ◽  
Anna A. Kulminskaya ◽  
Konstantin A. Shabalin ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Small Angle ◽  
Circular Dichroism Spectroscopy ◽  
X Ray ◽  
X Ray Scattering ◽  
Circular Dichroïsm ◽  
Structural Insights ◽  
Ray Scattering

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.

Chemistry and Structure of Al(OH)/Organic Precipitates. A Small-Angle X-ray Scattering Study. 3. Depolymerization of the Al13 Polycation by Organic Ligands

Langmuir ◽  
1994 ◽  
Vol 10 (11) ◽  
pp. 4353-4356 ◽  
Author(s):  
A. Masion ◽  
F. Thomas ◽  
D. Tchoubar ◽  
J. Y. Bottero ◽  
P. Tekely
Keyword(s):  
Small Angle ◽  
Organic Ligands ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering
Sign in / Sign up

Export Citation Format

Share Document