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Kulakovich O, Gurinovich L, Li H, Ramanenka A, Trotsiuk L, Muravitskaya A, Wei J, Li H, Matveevskaya N, Guzatov DV, Gaponenko S. Photostability enhancement of InP/ZnSe/ZnSeS/ZnS quantum dots by plasmonic nanostructures. NANOTECHNOLOGY 2021; 32:035204. [PMID: 33007765 DOI: 10.1088/1361-6528/abbdde] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effect of gold and silver plasmonic films on the photoluminescence and photostability of InP/ZnSe/ZnSeS/ZnS nanocrystals (quantum dots) is reported. Colloidal gold films promote the photostability enhancement of InP/ZnSe/ZnSeS/ZnS quantum dots (more durable emission properties in the presence of metal nanostructures) through reducing exciton lifetime. In contrast, silver decreases the photostability of InP/ZnSe/ZnSeS/ZnS quantum dots without changing the photoluminescence intensity and kinetics. By adjusting the excitation wavelength closer to the extinction band of gold nanoparticles a 1.8-fold enhancement of luminescence intensity has been obtained using a polyelectrolyte spacer between the metal and InP/ZnSe/ZnSeS/ZnS nanoparticles. Thus, plasmonics offers essential practical improvement of light emitters in terms of their durable luminescent properties upon prolonged optical excitation without losses in luminescence efficiency or even along with increased efficiency.
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Affiliation(s)
- O Kulakovich
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
| | - L Gurinovich
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
| | - Hui Li
- Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 10008,1 People's Republic of China
| | - A Ramanenka
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
| | - L Trotsiuk
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
| | - A Muravitskaya
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
| | - Jing Wei
- Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 10008,1 People's Republic of China
| | - Hongbo Li
- Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 10008,1 People's Republic of China
| | - N Matveevskaya
- Institute for Single Crystals, National Academy of Sciences of Ukraine, Nauky Ave., 60, Kharkiv 61178, Ukraine
| | - D V Guzatov
- Yanka Kupala State University of Grodno, Grodno 230023, Belarus
| | - S Gaponenko
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimosti Ave, Minsk 220072, Belarus
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Zhang Y, Ersoy O, Karatutlu A, Little W, Sapelkin A. Local structure of Ge quantum dots determined by combined numerical analysis of EXAFS and XANES data. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:253-259. [PMID: 26698071 DOI: 10.1107/s160057751501913x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 10/10/2015] [Indexed: 06/05/2023]
Abstract
The sensitivity of X-ray absorption near-edge structure (XANES) to the local symmetry has been investigated in small (∼4 nm) matrix-free Ge quantum dots. The FDMNES package was used to calculate the theoretical XANES spectra that were compared with the experimental data of as-prepared and annealed nanoparticles. It was found that XANES data for an as-prepared sample can only be adequately described if the second coordination shell of the diamond-type structural model is included in the FDMNES calculations. This is in contrast to the extended X-ray absorption fine-structure data that show only the first-shell signal. These results suggest that, despite the high degree of disorder and a large surface-to-volume ratio, as-prepared small Ge quantum dots retain the diamond-type symmetry beyond the first shell. Furthermore, we utilized this sensitivity of XANES to the local symmetry to study annealed Ge quantum dots and found evidence for significant structural distortion which we attribute to the existence of surface disorder in the annealed oxygen-free Ge quantum dots.
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Affiliation(s)
- Yuanpeng Zhang
- School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
| | - Osman Ersoy
- School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
| | - Ali Karatutlu
- School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
| | - William Little
- School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
| | - Andrei Sapelkin
- School of Physics and Astronomy, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
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Siraj N, El-Zahab B, Hamdan S, Karam TE, Haber LH, Li M, Fakayode SO, Das S, Valle B, Strongin RM, Patonay G, Sintim HO, Baker GA, Powe A, Lowry M, Karolin JO, Geddes CD, Warner IM. Fluorescence, Phosphorescence, and Chemiluminescence. Anal Chem 2015; 88:170-202. [PMID: 26575092 DOI: 10.1021/acs.analchem.5b04109] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Noureen Siraj
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Bilal El-Zahab
- Department of Mechanical and Materials Engineering, Florida International University , Miami, Florida 33174, United States
| | - Suzana Hamdan
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Tony E Karam
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Louis H Haber
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Min Li
- Process Development Center, Albemarle Corporation , Baton Rouge, Louisiana 70805, United States
| | - Sayo O Fakayode
- Department of Chemistry, Winston-Salem State University , Winston-Salem, North Carolina 27110, United States
| | - Susmita Das
- Department of Civil Engineering, Adamas Institute of Technology , Barasat, Kolkata 700126, West Bengal India
| | - Bertha Valle
- Department of Chemistry, Texas Southern University , Houston, Texas 77004, United States
| | - Robert M Strongin
- Department of Chemistry, Portland State University , Portland, Oregon 97207, United States
| | - Gabor Patonay
- Department of Chemistry, Georgia State University , Atlanta, Georgia 30302-4098, United States
| | - Herman O Sintim
- Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| | - Gary A Baker
- Department of Chemistry, University of Missouri Columbia , Columbia, Missouri 65211-7600, United States
| | - Aleeta Powe
- Department of Chemistry, University of Louisville , Louisville, Kentucky 40208, United States
| | - Mark Lowry
- Department of Chemistry, Portland State University , Portland, Oregon 97207, United States
| | - Jan O Karolin
- Institute of Fluorescence, University of Maryland Baltimore County , Baltimore, Maryland 21202, United States
| | - Chris D Geddes
- Institute of Fluorescence, University of Maryland Baltimore County , Baltimore, Maryland 21202, United States
| | - Isiah M Warner
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
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