scholarly journals Ultrasmall aqueous starch-capped CuS quantum dots with tunable localized surface plasmon resonance and composition for the selective and sensitive detection of mercury(ii) ions

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14050-14059 ◽  
Author(s):  
S. Irudhaya Raj ◽  
Adhish Jaiswal ◽  
Imran Uddin
Keyword(s):  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Sensitive Detection ◽  
Localized Surface Plasmon ◽  
Mercury Ions ◽  
Colorimetric Response

Colorimetric response of CuS QDs with mercury ions.

scholarly journals Localized Surface Plasmon Resonance Decorated with Carbon Quantum Dots and Triangular Ag Nanoparticles for Chlorophyll Detection

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 35
Author(s):  
Nur Afifah Ahmad Nazri ◽  
Nur Hidayah Azeman ◽  
Mohd Hafiz Abu Bakar ◽  
Nadhratun Naiim Mobarak ◽  
Yunhan Luo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Detection Limit ◽  
Functional Groups ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Linear Response ◽  
Localized Surface Plasmon Resonance ◽  
Carbon Quantum Dots ◽  
Localized Surface Plasmon

This paper demonstrates carbon quantum dots (CQDs) with triangular silver nanoparticles (AgNPs) as the sensing materials of localized surface plasmon resonance (LSPR) sensors for chlorophyll detection. The CQDs and AgNPs were prepared by a one-step hydrothermal process and a direct chemical reduction process, respectively. FTIR analysis shows that a CQD consists of NH2, OH, and COOH functional groups. The appearance of C=O and NH2 at 399.5 eV and 529.6 eV in XPS analysis indicates that functional groups are available for adsorption sites for chlorophyll interaction. A AgNP–CQD composite was coated on the glass slide surface using (3-aminopropyl) triethoxysilane (APTES) as a coupling agent and acted as the active sensing layer for chlorophyll detection. In LSPR sensing, the linear response detection for AgNP–CQD demonstrates R2 = 0.9581 and a sensitivity of 0.80 nm ppm−1, with a detection limit of 4.71 ppm ranging from 0.2 to 10.0 ppm. Meanwhile, a AgNP shows a linear response of R2 = 0.1541 and a sensitivity of 0.25 nm ppm−1, with the detection limit of 52.76 ppm upon exposure to chlorophyll. Based on these results, the AgNP–CQD composite shows a better linearity response and a higher sensitivity than bare AgNPs when exposed to chlorophyll, highlighting the potential of AgNP–CQD as a sensing material in this study.

scholarly journals The detection and identification of dengue virus serotypes with quantum dot and AuNP regulated localized surface plasmon resonance

2020 ◽  
Vol 2 (2) ◽  
pp. 699-709 ◽  
Author(s):  
Ankan Dutta Chowdhury ◽  
Kenshin Takemura ◽  
Indra Memdi Khorish ◽  
Fahmida Nasrin ◽  
Mya Myat Ngwe Tun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Dengue Virus ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Sensing System ◽  
Detection And Identification ◽  
Dengue Virus Serotypes

A fluorometric sensing system using LSPR phenomenon between fluorescent quantum dots and its adjacent AuNP to detect four closely related but serologically distinct dengue viruses (DENVs).

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