Surface modification effects on defect-related photoluminescence in colloidal CdS quantum dots
Literature Information
TaeGi Lee, Kunio Shimura, DaeGwi Kim
We investigated the effects of surface modification on the defect-related photoluminescence (PL) band in colloidal CdS quantum dots (QDs). A size-selective photoetching process and a surface modification technique with a Cd(OH)2 layer enabled the preparation of size-controlled CdS QDs with high PL efficiency. The Stokes shift of the defect-related PL band before and after the surface modification was ∼1.0 eV and ∼0.63 eV, respectively. This difference in the Stokes shifts suggests that the origin of the defect-related PL band was changed by the surface modification. Analysis by X-ray photoelectron spectroscopy revealed that the surface of the CdS QDs before and after the surface modification was S rich and Cd rich, respectively. These results suggest that Cd-vacancy acceptors and S-vacancy donors affect PL processes in CdS QDs before and after the surface modification, respectively.
Related Literature
Dihydroindeno[1,2-b]pyrroles: new Al3+ selective off–on chemosensors for bio-imaging in living HepG2 cells
Kajal Mal, Barnali Naskar, Animesh Mondal, Sanchita Goswami, Chandraday Prodhan, Keya Chaudhuri, Chhanda Mukhopadhyay
DOI: 10.1039/C8OB01411F
Covalent capture of OGT's active site using engineered human-E. coli chimera and intrastrand DNA cross-links
William Copp, Christopher J. Wilds
DOI: 10.1039/C8OB02453G
Highly efficient synthesis of benzodioxins with a 2-site quaternary carbon structure by secondary amine-catalyzed dual Michael cascade reactions
Xuefeng He, Yongsu Li, Meng Wang, Hui-Xuan Chen, Bin Chen, Hao Liang, Yaqi Zhang, Jiyan Pang, Liqin Qiu
DOI: 10.1039/C8OB01029C
Enzymatic synthesis of base-modified RNA by T7 RNA polymerase. A systematic study and comparison of 5-substituted pyrimidine and 7-substituted 7-deazapurine nucleoside triphosphates as substrates
Pavla Perlíková, Radek Pohl
DOI: 10.1039/C8OB01498A
Cesium carbonate-promoted synthesis of aryl methyl sulfides using S-methylisothiourea sulfate under transition-metal-free conditions
Caiyang Zhang, You Zhou, Jintao Huang, Canhui Tu, Xiaoai Zhou, Guodong Yin
DOI: 10.1039/C8OB01758A
A novel synthesis of N-hydroxy-3-aroylindoles and 3-aroylindoles‡
Gabriella Ieronimo, Giovanni Palmisano, Angelo Maspero, Alessandro Marzorati, Luca Scapinello, Norberto Masciocchi, Giancarlo Cravotto, Alessandro Barge, Marco Simonetti, Keshav Lalit Ameta, Kenneth M. Nicholas, Andrea Penoni
DOI: 10.1039/C8OB01471J
Unveiling sequential late-stage methyltransferase reactions in the meleagrin/oxaline biosynthetic pathway
Sean A. Newmister, Stelamar Romminger, Jennifer J. Schmidt, Roberto G. S. Berlinck
DOI: 10.1039/C8OB01565A
Catalytic enantioselective one-pot approach to cis- and trans-2,3-diaryl substituted 1,5-benzothiazepines
Sara Meninno, Ilaria Quaratesi, Chiara Volpe, Andrea Mazzanti, Alessandra Lattanzi
DOI: 10.1039/C8OB01988F
Transition metal-free coupling of terminal alkynes and hypervalent iodine-based alkyne-transfer reagents to access unsymmetrical 1,3-diynes
J. Schörgenhumer, M. Waser
DOI: 10.1039/C8OB02375A
You might also like
What are the main uses of 1-(3-Aminophenyl)-3-[(3R)-1-(3,3-dimethyl-2-oxobutyl)-2-oxo-5-(2-pyridinyl)-2,3-dihydro-1H-1,4-benzodiazepin-3-yl]urea (CAS: 155412-88-7)?
This compound is mainly used as an intermediate in the synthesis of antipsychoti...
How should waste containing 1-(D-Ribofuranosyl)-1,4-dihydro-3-pyridinecarboxamide (CAS: 19132-12-8) be handled?
Waste containing 1-(D-Ribofuranosyl)-1,4-dihydro-3-pyridinecarboxamide (CAS: 191...
What regulatory guidelines apply to 2-Methyl-2-propanyl 3-bromo-3-(hydroxymethyl)-1-azetidinecarboxylate (CAS: 2007919-81-3)?
2-Methyl-2-propanyl 3-bromo-3-(hydroxymethyl)-1-azetidinecarboxylate (CAS: 20079...
What is N-(4-Chloro-2-pyridinyl)acetamide (CAS: 245056-66-0)?
N-(4-Chloro-2-pyridinyl)acetamide (CAS: 245056-66-0) is a chemical compound with...
What is 5-Chloro-2-hydroxybenzoic acid (CAS: 321-14-2)?
5-Chloro-2-hydroxybenzoic acid, also known as 5-chlorosalicylic acid, is an arom...
What precautions should be taken when handling 1,1-Dichloro-1-fluoroethane (CAS: 1717-00-6)?
When handling 1,1-Dichloro-1-fluoroethane (CAS: 1717-00-6), it is important to u...
What are the physical and chemical properties of Fmoc-(2S,3R)-3-phenylpyrrolidine-2-carboxylic acid (CAS: 281655-32-1)?
Fmoc-(2S,3R)-3-phenylpyrrolidine-2-carboxylic acid is a white crystalline solid ...
What are the main uses of 4-Amino-5-bromo-2-pyridinecarboxylic acid (CAS: 1363381-01-4)?
4-Amino-5-bromo-2-pyridinecarboxylic acid is primarily used as a precursor in th...
What precautions should be taken when handling (S)-tert-butyl 2-((2-(4-bromophenyl)-2-oxoethyl)carbamoyl)pyrrolidine-1-carboxylate (CAS: 1007881-98-2)?
Handling this compound should be done with personal protective equipment (PPE) i...
What precautions should be taken when handling 8-bromo-2,2-dimethyl-3,4-dihydro-2H-1,4-benzoxazin-3-one (CAS: 688363-73-7)?
When handling 8-bromo-2,2-dimethyl-3,4-dihydro-2H-1,4-benzoxazin-3-one, use prop...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











![1-[3-(4-Morpholinylsulfonyl)phenyl]methanamine structure 1-[3-(4-Morpholinylsulfonyl)phenyl]methanamine structure](https://static.chemtradehub.com/structs/933/933989-32-3-51af.webp)
![Pyrazolo[1,5-a]pyridine-3-carbothioamide structure Pyrazolo[1,5-a]pyridine-3-carbothioamide structure](https://static.chemtradehub.com/structs/885/885275-44-5-aae0.webp)

