scholarly journals Highly Sensitive Emission Sensor Based on Surface Plasmon Enhanced Energy Transfer between Gold Nanoclusters and Silver Nanoparticles

2009 ◽  
Vol 114 (2) ◽  
pp. 799-802 ◽  
Author(s):  
Chih-Wei Chen ◽  
Chun-Hsiung Wang ◽  
Chih-Ming Wei ◽  
Chun-Yi Hsieh ◽  
Yung-Ting Chen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Energy Transfer ◽  
Surface Plasmon ◽  
Gold Nanoclusters ◽  
Highly Sensitive

scholarly journals FLUORESCENT PROPERTIES OF DOXYCYCLINE IN PRESENCE OF SILVER NANOCLUSTERS

2020 ◽  
Vol 64 (1) ◽  
pp. 34-40
Author(s):  
Tatyana D. Smirnova ◽  
Elens A. Zhelobitskaya ◽  
Tatyana G. Danilina ◽  
Natalya A. Simbireva
Keyword(s):  
Silver Nanoparticles ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Surface Plasmon ◽  
Limit Of Detection ◽  
Silver Nanoclusters ◽  
Complexing Agent ◽  
Intramolecular Energy Transfer ◽  
Sensitized Fluorescence ◽  
Wide Range

The paper shows that in the presence of silver nanoparticles the efficiency of intramolecular energy transfer in the complex of europium with doxycycline increases. It is proved that sensitivity of determination increases and limit of detection of doxycycline decreases by the method of sensitized fluorescence. The justification of the observed effects is given. The amplification of the signal of sensitized fluorescence in the presence of silver nanoparticles (energy donor) is the result of resonant transfer of excitation energy between the nanoparticle and the antibiotic ion, which is implemented under conditions of overlapping of the local surface plasmon resonance spectrum and excitation of the doxycycline ligand located near the surface of the nanoparticle. As a result of exposure to the antibiotic external radiation source and the local field of the surface plasmon increases the efficiency of tetracycline excitation, which contributes to the effectiveness of intramolecular energy transfer in europium chelate with doxycycline, doubling the intensity and lifetime. Modification of the surface of silver nanoparticles by europium ions allows to reduce the distance between the surface of a nanoparticle and an antibiotic, to increase the intensity of the signal of sensitized fluorescence by more than 100 times. The role of the stabilizer of a non-chromophore-containing ligand, − citrateion, in the formation of the analytical signal lies in its participation in the formation of a multi-ligand Eu3+ complex on the surface of a nanoobject, which reduces the distance between the donor and the acceptor, as well as the additional removal of water molecules from the immediate environment of the complexing agent ion, suppressing the process of excitation energy dissipation. On the basis of the conducted researches the fluorimetric technique of definition of doxycycline in medicines is offered. It differs in a low limit of detection (6.0·10-9 M) and a wide range of the defined concentrations from 1.0·10-8 to 1.0·10-5 M.

scholarly journals Colorimetric Detection of Hg(II) Ion Using Silver Nanoparticles Capped with 3-Hydroxybenzoic Acid

Molekul ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 18
Author(s):  
Gusrizal Gusrizal ◽  
Andi Hairil Alimuddin ◽  
Ajuk Sapar ◽  
Rizki Noviani Ridwan ◽  
Sri Juari Santosa
Keyword(s):  
Silver Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Colorimetric Detection ◽  
Hydroxybenzoic Acid ◽  
Surface Plasmon Resonance Peak ◽  
Plasmon Resonance Peak ◽  
Highly Sensitive ◽  
First Time

In this paper, we report for the first time thesimple method for detection of Hg(II) ion in anaqueousmedium using silver nanoparticles capped with 3-hydroxybenzoic acid. Silver nanoparticles capped with 3-hydroxybenzoic acid were preparedby reduction of the silver ion with 3-hydroxybenzoic acid and without surface functionalization. The formation of silver nanoparticles was characterized by a UV-Visible spectrophotometer. The yellowcolloid of prepared silver nanoparticles capped with 3-hydroxybenzoic acid showed a surface plasmon resonance peak at 420 nm. The ability of silver nanoparticles capped with 3-hydroxybenzoic acid in detection was tested by doing a reaction with several metal ions individually(Na(I), K(I), Cu(II), Zn(II), Ca(II), Mg(II), Hg(II), Mn(II), Ni(II), Pb(II), and Co(II)). It was foundthat silver nanoparticles capped with 3-hydroxybenzoic acid highly selective toHg(II) and then the prepared silver nanoparticles were developedfor detection of Hg(II) ion. Addition of 1 mL Hg(II) ion into 4mL the as-preparedsilver nanoparticles reducedthe peak of surface plasmon resonance spectra, andthe reduction of peak intensity was proportional to the concentration of Hg(II) ion. A goodlinear relationship (R2= 0.998) between absorbance at 420 nm and concentrationof Hg(II) over the range 1.0x10-3to 5.5x10-3M was obtained. Silver nanoparticles capped with 3-hydroxybenzoic acid were highly sensitive to Hg (II) ion with the detection limit down to 4.7x10-5M. Application the method to the real water sample showed the excellentresult with recovery ranged from 98 to 101%. The proposed method was found to be useful forthe colorimetric detection of Hg(II) ion in an aqueousmedium.

Highly Sensitive and Reproducible SERS Substrates Based on Ordered Micropyramid Array and Silver Nanoparticles

2021 ◽  
Author(s):  
Chengpeng Zhang ◽  
Shuai Chen ◽  
Zhaoliang Jiang ◽  
Zhenyu Shi ◽  
Jilai Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Sers Substrates ◽  
Highly Sensitive

A New Strategy to Construct Gold Nanoclusters-Based Optical Probe Using Luminescence Resonance Energy Transfer

2021 ◽  
Author(s):  
Shuyang Zhai ◽  
Wei Hu ◽  
Chen Fan ◽  
Wenqi Feng ◽  
Zhi-hong Liu
Keyword(s):  
Energy Transfer ◽  
Gold Nanoclusters ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Optical Probe ◽  
Luminescent Materials ◽  
Metal Nanoclusters ◽  
New Strategy ◽  
Photoluminescence Efficiency

Monolayer-protected metal nanoclusters (MPCs) are emerging as intriguing luminescent materials, but the construction of MPCs-based optical probe is still scarce because of both the limited photoluminescence efficiency of MPCs and...

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