Universal Size-Dependent Trend in Auger Recombination in Direct-Gap and Indirect-Gap Semiconductor Nanocrystals

2009 ◽  
Vol 102 (17) ◽  
Author(s):  
István Robel ◽  
Ryan Gresback ◽  
Uwe Kortshagen ◽  
Richard D. Schaller ◽  
Victor I. Klimov
Keyword(s):  
Auger Recombination ◽  
Semiconductor Nanocrystals ◽  
Size Dependent

Size-Dependent Trap-Assisted Auger Recombination in Semiconductor Nanocrystals

Nano Letters ◽  
2013 ◽  
Vol 13 (4) ◽  
pp. 1810-1815 ◽  
Author(s):  
Alicia W. Cohn ◽  
Alina M. Schimpf ◽  
Carolyn E. Gunthardt ◽  
Daniel R. Gamelin
Keyword(s):  
Auger Recombination ◽  
Semiconductor Nanocrystals ◽  
Size Dependent

Size-Dependent Valence and Conduction Band-Edge Energies of Semiconductor Nanocrystals

ACS Nano ◽  
2011 ◽  
Vol 5 (7) ◽  
pp. 5888-5902 ◽  
Author(s):  
Jacek Jasieniak ◽  
Marco Califano ◽  
Scott E. Watkins
Keyword(s):  
Conduction Band ◽  
Semiconductor Nanocrystals ◽  
Band Edge ◽  
Conduction Band Edge ◽  
Size Dependent

Auger recombination as a probe of the Mott transition in semiconductor nanocrystals

2000 ◽  
Vol 76 (20) ◽  
pp. 2850-2852 ◽  
Author(s):  
P. Němec ◽  
P. Malý ◽  
M. Nikl ◽  
K. Nitsch
Keyword(s):  
Auger Recombination ◽  
Semiconductor Nanocrystals ◽  
Mott Transition

Nonradiative Auger Recombination in Semiconductor Nanocrystals

Nano Letters ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 2092-2098 ◽  
Author(s):  
Roman Vaxenburg ◽  
Anna Rodina ◽  
Andrew Shabaev ◽  
Efrat Lifshitz ◽  
Alexander L. Efros
Keyword(s):  
Auger Recombination ◽  
Semiconductor Nanocrystals

The Cytotoxicity of Quantum Dots CdSe/CdS functionalized with -COOH and –NH2

2009 ◽  
Vol 1220 ◽  
Author(s):  
Lin-Jing Shen ◽  
Jing Cui ◽  
Jin-Hua Liu ◽  
Xiao-Bo Xu ◽  
Ming-Qiang Zhu
Keyword(s):  
Quantum Dots ◽  
Fluorescent Dyes ◽  
Semiconductor Nanocrystals ◽  
Assay Method ◽  
Dependent Effect ◽  
Lower Toxicity ◽  
Size Dependent ◽  
Dose Dependent ◽  
Dose Dependent Effect ◽  
Mtt Assays

AbstractRecently, semiconductor nanocrystals or quantum dots (QDs) aroused great concern because of their unique properties such as the size-dependent photoluminescence. They have many excellent applications in areas of molecular bioimaging, medical detection and even energy, especially as biosensing and imaging instead of fluorescent dyes. For the bio-safety, however, we should assess the cytotoxicity of QDs before used in biomedical imaging. Here, the cytotoxicity of amino-functionalized CdSe/CdS (CdSe/CdS-NH2) QDs and carboxy-functionalized CdSe/CdS (CdSe/CdS-COOH) QDs was investigated by MTT assay method. According to our findings, both CdSe/CdS-NH2 and CdSe/CdS-COOH have a dose-dependent effect on cell proliferation. The cytotoxicity of QDs varies with storing time of QDs and kinds of cells. The cytotoxicity of QDs modified with -COOH or -NH2 groups both vary with concentrations in positive linear or change with QD storing time in negative linear. The results indicate that CdSe/CdS-COOH QDs have lower toxicity than CdSe/CdS-NH2 QDs. Hela cell is somewhat more sensitive to amino- and carboxy-modified QDs than Bel7404 cell for MTT assays.

scholarly journals Size-Dependent Properties of Solution-Processable Conductive MOF Nanocrystals

2021 ◽  
Author(s):  
Checkers Marshall ◽  
Liam Twight ◽  
Josh Dvorak ◽  
Alexandra Overland ◽  
Carl Brozek
Keyword(s):  
Colloidal Stability ◽  
Semiconductor Nanocrystals ◽  
Nanoparticle Synthesis ◽  
Device Fabrication ◽  
Host Interactions ◽  
Size Dependent ◽  
Complex Architectures ◽  
Metal Organic ◽  
Solution Processable ◽  
Conductive Thin Films

The diverse optical, magnetic, and electronic behaviors of most colloidal semiconductor nanocrystals emerge from materials with limited structural and elemental compositions. Conductive metal-organic frameworks (MOFs) possess rich compositions with complex architectures, but remain unexplored as nanocrystals, hindering their incorporation into scalable devices. Here, we report the controllable synthesis of conductive MOF nanoparticles based on Fe(1,2,3-trizolate)2. Sizes can be tuned as small as 5.5 nm, ensuring indefinite colloidal stability. These solution-processable MOFs can be analyzed by solution-state spectroscopy and electrochemistry and cast into conductive thin films with excellent uniformity. This unprecedented analysis of MOF materials reveals a strong size-dependence in optical and electronic behavior sensitive to the intrinsic porosity and guest-host interactions of MOFs. These results provide a radical departure from typical MOF characterization, enabling insight into physical properties otherwise impossible with bulk analogs, while offering a roadmap for the future of MOF nanoparticle synthesis and device fabrication.

Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals

2011 ◽  
Vol 115 (51) ◽  
pp. 25241-25246 ◽  
Author(s):  
Qiang Zhang ◽  
Wenjie Gong ◽  
Jiaheng Wang ◽  
Xinkun Ning ◽  
Zhenhua Wang ◽  
...  
Keyword(s):  
Semiconductor Nanocrystals ◽  
Photocatalytic Properties ◽  
Single Crystalline ◽  
Size Dependent
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