Upconverting nanoparticle to quantum dot FRET for homogeneous double-nano biosensors

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13270-13277 ◽  
Author(s):  
Leena Mattsson ◽  
K. David Wegner ◽  
Niko Hildebrandt ◽  
Tero Soukka
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Near Infrared ◽  
Photophysical Properties ◽  
Semiconductor Quantum Dots ◽  
Optical Biosensing ◽  
Donor Acceptor

The unique photophysical properties of upconverting nanoparticles (UCNPs) and semiconductor quantum dots (QDs) render them an attractive donor–acceptor combination for near-infrared (NIR) excited FRET-based optical biosensing.

Plasmon–exciton interaction strongly increases the efficiency of a quantum dot–based near-infrared photodetector operating in the two-photon absorption mode under normal conditions.

Nanoscale ◽  
2021 ◽  
Author(s):  
Victor A. Krivenkov ◽  
Pavel Samokhvalov ◽  
Ivan Vasil’evskii ◽  
Nikolai Kargin ◽  
Igor Nabiev
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Near Infrared ◽  
Semiconductor Quantum Dots ◽  
Photon Absorption ◽  
Bandgap Energy ◽  
Infrared Photodetector ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Mode

Semiconductor quantum dots (QDs) are known for their high two-photon absorption (TPA) capacity. This allows them to efficiently absorb infrared photons with energies lower than the bandgap energy. Moreover, TPA...

A Comparison of the Photophysical Properties of Thiolate-Capped CdS Quantum Dots with Thiolate-Capped CdS Molecular Clusters

1999 ◽  
Vol 571 ◽  
Author(s):  
Lee K. Yeung ◽  
Kelly Sooklal ◽  
Rahina Mahtab ◽  
Bin Zhang ◽  
Richard D. Adams ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Property ◽  
Quantum Dot ◽  
Photophysical Properties ◽  
Molecular Clusters ◽  
Semiconductor Quantum Dots ◽  
Size Distributions ◽  
Cds Quantum Dots ◽  
Capping Ligands ◽  
Made In

ABSTRACTIn the last several years, great advances have been made in the ability to synthesize semiconductor quantum dots with very narrow size distributions. Here, we report the synthesis of a series of thiolate-capped CdS quantum dots having reasonably narrow size distributions and make optical property comparisons to the crystallographically defined CdS molecular clusters having essentially “zero” size distribution. These clusters contain a “Cd10S4” core and thiolate/halide capping ligands. The luminescence of the molecular clusters, like the nanoparticles, is greatly influenced by the nature of the capping ligands. Additionally, the luminescence of the molecular clusters can be quite similar to that observed for their larger quantum dot counterparts.

Quantum dot–polymer conjugates for stable luminescent displays

Nanoscale ◽  
2018 ◽  
Vol 10 (28) ◽  
pp. 13368-13374 ◽  
Author(s):  
Sushant Ghimire ◽  
Anjaly Sivadas ◽  
Ken-ichi Yuyama ◽  
Yuta Takano ◽  
Raju Francis ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Semiconductor Quantum Dots ◽  
Broad Absorption ◽  
Polymer Conjugates ◽  
Absorption Of Light

The broad absorption of light in the UV-Vis-NIR region and the size-based tunable photoluminescence color of semiconductor quantum dots make these tiny crystals one of the most attractive antennae in solar cells and phosphors in electrooptical devices.

Near-infrared nano-spectroscopy of semiconductor quantum dots using a phase-change mask layer

2012 ◽  
Vol 100 (6) ◽  
pp. 063111 ◽  
Author(s):  
N. Tsumori ◽  
M. Takahashi ◽  
R. Kubota ◽  
P. Regreny ◽  
M. Gendry ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Phase Change ◽  
Near Infrared ◽  
Semiconductor Quantum Dots ◽  
Mask Layer

scholarly journals Impact of reaction variables and PEI/l-cysteine ratio on the optical properties and cytocompatibility of cationic Ag2S quantum dots as NIR bio-imaging probes

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77644-77654 ◽  
Author(s):  
Fatma Demir Duman ◽  
Rouhullah Khodadust ◽  
Emek Goksu Durmusoglu ◽  
Mustafa Baris Yagci ◽  
Havva Yagci Acar
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Penetration Depth ◽  
Fluorescent Probes ◽  
Near Infrared ◽  
Semiconductor Quantum Dots ◽  
Imaging Probes ◽  
Bio Imaging ◽  
Ag2s Quantum Dots

Near-infrared emitting semiconductor quantum dots (NIRQDs) are popular fluorescent probes due to better penetration depth and elimination of tissue autofluorescence.

scholarly journals Models of semiconductor quantum dots blinking based on spectral diffusion -=SUP=-*-=/SUP=-

2019 ◽  
Vol 126 (1) ◽  
pp. 77
Author(s):  
V.K. Busov ◽  
P.A. Frantsuzov
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Quantum Dot ◽  
Semiconductor Quantum Dots ◽  
Spectral Diffusion ◽  
The Other ◽  
Diffusion Controlled ◽  
Colloidal Quantum Dot ◽  
Marcus Model ◽  
Observed Behavior

AbstractThree models of single colloidal quantum dot emission fluctuations (blinking) based on spectral diffusion were considered analytically and numerically. It was shown that the only one of them, namely the Frantsuzov and Marcus model reproduces the key properties of the phenomenon. The other two models, the Diffusion-Controlled Electron Transfer (DCET) model and the Extended DCET model predict that after an initial blinking period, most of the QDs should become permanently bright or permanently dark which is significantly different from the experimentally observed behavior.

scholarly journals Photoluminescent Nanomaterials for Medical Biotechnology

Acta Naturae ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 16-31
Author(s):  
Evgenii L. Guryev ◽  
Samah Shanwar ◽  
Andrei Vasilevich Zvyagin ◽  
Sergey M. Deyev ◽  
Irina V. Balalaeva
Keyword(s):  
Quantum Dots ◽  
Porous Silicon ◽  
Sensitivity And Specificity ◽  
Carbon Dots ◽  
Photophysical Properties ◽  
Gold Nanoclusters ◽  
Semiconductor Quantum Dots ◽  
Diagnostic Methods ◽  
Optical Diagnostic ◽  
Therapy Effectiveness

Creation of various photoluminescent nanomaterials has significantly expanded the arsenal of approaches used in modern biomedicine. Their unique photophysical properties can significantly improve the sensitivity and specificity of diagnostic methods, increase therapy effectiveness, and make a theranostic approach to treatment possible through the application of nanoparticle conjugates with functional macromolecules. The most widely used nanomaterials to date are semiconductor quantum dots; gold nanoclusters; carbon dots; nanodiamonds; semiconductor porous silicon; and up-conversion nanoparticles. This paper considers the promising groups of photoluminescent nanomaterials that can be used in medical biotechnology: in particular, for devising agents for optical diagnostic methods, sensorics, and various types of therapy.

Photophysical properties and photodynamic therapy activity of ameso-tetra(4-carboxyphenyl)porphyrin tetramethyl ester–graphene quantum dot conjugate

2019 ◽  
Vol 43 (11) ◽  
pp. 4518-4524 ◽  
Author(s):  
Muthumuni Managa ◽  
Bokolombe Pitchou Ngoy ◽  
Tebello Nyokong
Keyword(s):  
Quantum Dots ◽  
Photodynamic Therapy ◽  
Quantum Dot ◽  
Photophysical Properties ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot

Ameso-tetra(4-carboxyphenyl)porphyrin tetramethyl ester and the Zn and GaCl derivatives were π–π stacked with graphene quantum dots to form conjugates and their photophysical and photodynamic therapy properties were investigated.

Inorganic Quantum Dot - Organic Dendrimer Nanocomposite Materials

1999 ◽  
Vol 576 ◽  
Author(s):  
K. Sooklal ◽  
J. Huang ◽  
C. J. Murphy ◽  
L. Hanus ◽  
H. J. Ploehn
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Dot ◽  
Sol Gel ◽  
Nanocomposite Materials ◽  
Silica Sol ◽  
Semiconductor Quantum Dots ◽  
Current Interest ◽  
Cds Quantum Dots ◽  
Bright Blue

ABSTRACTSemiconductor quantum dots are of great current interest for their optical properties. We have developed a method for preparing CdS quantum dots in commercially available PAMAM Starburst dendrimers. The resulting CdS-dendrimer nanocomposites are exceptionally stable and emit brightly in the blue. The size of the dendrimer (its “generation”) has a surprisingly small effect on the optical properties of the resulting nanocomposites. The dot-dendrimer nanocomposites can be captured in a silica sol-gel matrix to yield a stable, bright blue-emitting glass.

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