Imaging Escherichia coli using functionalized core/shell CdSe/CdS quantum dots

By using the numerical discretization method within the effective-mass approximation, we have theoretically investigated the exciton-related Raman scattering, interband absorption and photoluminescence in colloidal CdSe/CdS core/shell quantum dots ensemble. The interband optical absorption and photoluminescence spectra have been revealed for CdSe/CdS quantum dots, taking into account the size dispersion of the ensemble. Numerical calculation of the differential cross section has been presented for the exciton-related Stokes–Raman scattering in CdSe/CdS quantum dots ensemble with different mean sizes.

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Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽

10.1039/d0ra08056j ◽

2021 ◽

Vol 11 (14) ◽

pp. 7961-7971

Author(s):

N. D. Vinh ◽

P. M. Tan ◽

P. V. Do ◽

S. Bharti ◽

V. X. Hoa ◽

...

Keyword(s):

Quantum Dots ◽

Optical Properties ◽

Dopant Concentration ◽

Core Shell ◽

Cds Quantum Dots ◽

Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

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Microwave assisted aqueous synthesis of core–shell CdSexTe1−x–CdS quantum dots for high performance sensitized solar cells

Chemical Communications ◽

10.1039/c3cc49335k ◽

2014 ◽

Vol 50 (26) ◽

pp. 3464 ◽

Cited By ~ 38

Author(s):

Jianheng Luo ◽

Huiyun Wei ◽

Fan Li ◽

Qingli Huang ◽

Dongmei Li ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

High Performance ◽

Core Shell ◽

Cds Quantum Dots ◽

Aqueous Synthesis ◽

Microwave Assisted ◽

Sensitized Solar Cells

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Utilization of Mn-Doped ZnSe/ZnS Core/Shell Quantum Dots for Rapid Detection of Escherichia coli O157:H7 and Methicillin-Resistant Staphylococcus aureus

Advances in Materials Science and Engineering ◽

10.1155/2020/9718706 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10

Author(s):

Thi-Diem Bui ◽

Quang-Liem Nguyen ◽

Thi-Bich Luong ◽

Van Thuan Le ◽

Van-Dat Doan

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Quantum Dots ◽

Fluorescent Labeling ◽

Core Shell ◽

Bacterial Cells ◽

Bacterial Strains ◽

Methicillin Resistant ◽

E Coli ◽

Mn Doped

In this study, Mn-doped ZnSe/ZnS core/shell quantum dots (CSQDs) were synthesized in aqueous solution using polyethylene glycol as a surface stabilizer and successfully applied in the detection of Escherichia coli O157:H7 and methicillin-resistant Staphylococcus aureus (MRSA) for the first time. The CSQDs were conjugated with anti-E. coli antibody and anti-MRSA antibody via protein A supported by 1-ethyl-3-(-3-dimethylaminopropyl)carbodiimide hydrochloride for fluorescent labeling of the intact bacterial cells. The detection was performed for the bacterial strains cultivated in Luria-Bertani liquid medium. The obtained results indicate that E. coli O157:H7 and MRSA can be detected within 30 min at a high sensitivity of 101 CFU/mL. This labeling method based on the highly fluorescent CSQDs may have great potential for use in the food industry to check and prevent outbreaks of foodborne illness.

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