Toward Biocompatible Semiconductor Quantum Dots: From Biosynthesis and Bioconjugation to Biomedical Application

Zhou, Juan; Yang, Yong; Zhang, Chunyang

doi:10.1021/acs.chemrev.5b00049

Cited by 606 publications

(358 citation statements)

References 602 publications

(1,264 reference statements)

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“…[1][2][3][4][5][6] More recently, they have expanded very fast towards the light emitting markets, namely those of display and lighting technologies. 7 Their employment as down-converters in light-emitting devices (LEDs) allows for higher peak brightness, better-saturated colors and improved device lifetimes.…”

Section: Introductionmentioning

confidence: 99%

Bridging Energetics and Dynamics of Exciton Trapping in Core–Shell Quantum Dots

2016

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The widespread application of quantum dots greatly profits from their broad absorption band.However, the variable nature of excitations within these bands is expected to result in undesired excitation energy dependence of steady state emission properties. We demonstrate the different role played by hot and cold carrier trapping in determining fluorescence quantum yields. Our analysis relates the energetic parameters with the available knowledge on the dynamics of charge trapping. It turns out that de-trapping processes play a pivotal role in determining steady state emission properties. We studied excitation dependent photoluminescence quantum yields (PLQY) in different CdSe/CdxZn1-xS (x = 0, 0.5, 1) quantum dots to identify best performing heterostructures, in terms of shell thickness and composition. Our rationalization of the observed behavior is focused on the modulation of trapping and de-trapping rates. The combination of experimental results and PLQY kinetics modeling reveals the need to consider hot-carrier trapping, supporting recent 2 dynamics observations. This work provides a deeper insight into trapping process in quantum dots, relating its energetics and dynamics.

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Section: Introductionmentioning

confidence: 99%

Bridging Energetics and Dynamics of Exciton Trapping in Core–Shell Quantum Dots

2016

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“…QDs are semiconductor nanomaterials with a well-known size/composition tunable fluorescent property, and have been widely used in biomedical research for sensing and imaging [72]. With this unique optical property, QDs have first found applications in the early 2000s for DNA sequence detection using SPR fluorescence spectroscopy [73].…”

Section: Spr Sensing With Non-plasmonic Nanoparticlesmentioning

confidence: 99%

Recent advances in surface plasmon resonance imaging: detection speed, sensitivity, and portability

et al. 2017

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Surface plasmon resonance (SPR) biosensor is a powerful tool for studying the kinetics of biomolecular interactions because they offer unique real-time and label-free measurement capabilities with high detection sensitivity. In the past two decades, SPR technology has been successfully commercialized and its performance has continuously been improved with lots of engineering efforts. In this review, we describe the recent advances in SPR technologies. The developments of SPR technologies focusing on detection speed, sensitivity, and portability are discussed in details. The incorporation of imaging techniques into SPR sensing is emphasized. In addition, our SPR imaging biosensors based on the scanning of wavelength by a solid-state tunable wavelength filter are highlighted. Finally, significant advances of the vast developments in nanotechnology-associated SPR sensing for sensitivity enhancements are also reviewed. It is hoped that this review will provide some insights for researchers who are interested in SPR sensing, and help them develop SPR sensors with better sensitivity and higher throughput.

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“…However, the poor intrinsic photostability of these organic fluorophores makes long-term imaging very challenging because of fast photobleaching. Semiconductor quantum dots (QDs) have been regarded as a promising alternative to organic fluorophores owing to their high brightness and photostability [4][5][6]. But their latent toxicity due to leaching of heavy metal ions, poor solubility and blinking characteristics limit their wide use.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene Quantum Dots as Bioimaging Probes

Zhang

Ding

2018

J. Anal. Test.

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The emerging graphene quantum dots (GQDs) have gained tremendous attention for their enormous potential in biological applications, owing to their unique and tunable photoluminescence properties, exceptional physicochemical features, high biocompatibility, small sizes and low costs. This mini review aims to update the latest results in rapidly evolving bioimaging research and to provide critical insights into exciting future developments. We firstly provide a brief review of their synthesis and optical properties and then place emphasis on both in vitro and in vivo imaging applications. Graphical AbstractKeywords Graphene quantum dots · Photoluminescence · Bioimaging probe · In vitro imaging · In vivo imaging

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Toward Biocompatible Semiconductor Quantum Dots: From Biosynthesis and Bioconjugation to Biomedical Application

Abstract: maximum emission wavelengths of 540 (green), 570 (yellow), 590 (orange), and 630 (red) nm are shown. Figure adapted from ref 156.

Cited by 606 publications

References 602 publications

Bridging Energetics and Dynamics of Exciton Trapping in Core–Shell Quantum Dots

Bridging Energetics and Dynamics of Exciton Trapping in Core–Shell Quantum Dots

Recent advances in surface plasmon resonance imaging: detection speed, sensitivity, and portability

Recent Advances in Graphene Quantum Dots as Bioimaging Probes

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