Near‐Infrared‐Emitting Two‐Dimensional Codes Based on Lattice‐Strained Core/(Doped) Shell Quantum Dots with Long Fluorescence Lifetime

Chen, Chi; Zhang, Pengfei; Gao, Guanhui; Gao, Duyang; Yang, Yong; Liu, Hong; Wang, Yuhui; Gong, Ping; Cai, Lintao

doi:10.1002/adma.201402369

Cited by 54 publications

(52 citation statements)

References 44 publications

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“…Different encoding techniques have been combined to exploit the benefits of each and increase the number of available barcodes. [162][163][164][165] Hybrid encoding is the most popular for anticounterfeiting applications as the combination of the encoding techniques can be used for multi-layer security with different types of covert codes. Moreover, hybrid encoding to generate more number of codes is desirable for multiplex diagnostic and imaging applications.…”

Section: Hybrid Encoding Approachesmentioning

confidence: 99%

Versatile design and synthesis of nano-barcodes

et al. 2017

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Encoded nano-structures/particles have been used for barcoding and are in great demand for the simultaneous analysis of multiple targets. Due to their nanoscale dimension(s), nano-barcodes have been implemented favourably for bioimaging, in addition to their security and multiplex bioassay application. In designing nano-barcodes for a specific application, encoding techniques, synthesis strategies, and decoding techniques need to be considered. The encoding techniques to generate unique multiple codes for nano-barcodes are based on certain encoding elements including optical (fluorescent and non-fluorescent), graphical, magnetic, and phase change properties of nanoparticles or their different shapes and sizes. These encoding elements can generally be embedded inside, decorated on the surface of nanostructures or self-assembled to prepare the nano-barcodes. The decoding techniques for each encoding technique are different and need to be suitable for the desired applications. This review will provide a thorough discussion on designing nano-barcodes, focusing on the encoding techniques, synthesis methods, and decoding for applications including bio-detection, imaging, and anti-counterfeiting. Additionally, associated challenges in the field and potential solutions will also be discussed. We believe that a comprehensive understanding on this topic could significantly contribute towards the advancement of nano-barcodes for a broad spectrum of applications.

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Section: Hybrid Encoding Approachesmentioning

confidence: 99%

Versatile design and synthesis of nano-barcodes

et al. 2017

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“…Coincidentally, Cu‐doped QDs offer a good choice for multi‐lifetime codes. Chen and colleagues proposed a new approach for preparing lattice‐strained CdTe/CdS:Cu QDs with tunable NIR fluorescence and long lifetime (~1 μs) by doping Cu 2+ in host QDs . Furthermore, synthesized QDs acted as NIR‐emitting 2D codes according to both multi‐lifetime and multi‐emission (Figure ).…”

Section: Application Of Cu‐doped Quantum Dots For Bioanalysismentioning

confidence: 99%

Cu‐doped quantum dots: a new class of near‐infrared emitting fluorophores for bioanalysis and bioimaging

2019

Luminescence

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Transition metal ion-doped quantum dots (QDs) exhibit unique optical and photophysical properties that offer significant advantages over undoped QDs, such as larger Stokes shift to avoid self-absorption/energy transfer, longer excited-state lifetimes, wider spectral window, and improved chemical and thermal stability. Among the doped QDs emitters, Cu is widely introduced into the doped QDs as novel, efficient, stable, and tunable optical materials that span a wide spectrum from blue to near-infrared (NIR) light. Their unique physical and chemical characteristics enable the use of Cu-doped QDs as NIR labels for bioanalysis and bioimaging. In this review, we discuss doping mechanisms and optical properties of Cu-doped QDs that are capable of NIR emission. Applications of Cu-doped QDs in in vitro biosensing and in in vivo bioimaging are highlighted. Moreover, a prospect of the future of Cu-doped QDs for bioanalysis and bioimaging are also summarized.

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“…In recent years, life-time encoding methods based on organic dyes, 92 QDs, 93,94 and metal ligand complexes 95 have been developed. Chen et al 94 developed NIR-emitting, 2D codes based on emission ( λ ) and lifetime ( τ ) of lattice-strained CdTe/CdS QDs (with short lifetime, q-dots) and lattice strained CdTe/CdS:Cu QDs (with long lifetime, d-dots).…”

Section: Spectrometrically or Optically Encoded Microspheres With mentioning

confidence: 99%

Suspension arrays based on nanoparticle-encoded microspheres for high-throughput multiplexed detection

et al. 2015

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Spectrometrically or optically encoded microsphere based suspension array technology (SAT) is applicable to the high-throughput, simultaneous detection of multiple analytes within a small, single sample volume. Thanks to the rapid development of nanotechnology, tremendous progress has been made in the multiplexed detecting capability, sensitivity, and photostability of suspension arrays. In this review, we first focus on the current stock of nanoparticle-based barcodes as well as the manufacturing technologies required for their production. We then move on to discuss all existing barcode-based bioanalysis patterns, including the various labels used in suspension arrays, label-free platforms, signal amplification methods, and fluorescence resonance energy transfer (FRET)-based platforms. We then introduce automatic platforms for suspension arrays that use superparamagnetic nanoparticle-based microspheres. Finally, we summarize the current challenges and their proposed solutions, which are centered on improving encoding capacities, alternative probe possibilities, nonspecificity suppression, directional immobilization, and “point of care” platforms. Throughout this review, we aim to provide a comprehensive guide for the design of suspension arrays, with the goal of improving their performance in areas such as multiplexing capacity, throughput, sensitivity, and cost effectiveness. We hope that our summary on the state-of-the-art development of these arrays, our commentary on future challenges, and some proposed avenues for further advances will help drive the development of suspension array technology and its related fields.

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Near‐Infrared‐Emitting Two‐Dimensional Codes Based on Lattice‐Strained Core/(Doped) Shell Quantum Dots with Long Fluorescence Lifetime

Cited by 54 publications

References 44 publications

Versatile design and synthesis of nano-barcodes

Versatile design and synthesis of nano-barcodes

Cu‐doped quantum dots: a new class of near‐infrared emitting fluorophores for bioanalysis and bioimaging

Suspension arrays based on nanoparticle-encoded microspheres for high-throughput multiplexed detection

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