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https://www.readbyqxmd.com/read/28295673/808-nm-light-excited-lanthanide-doped-nanoparticles-rational-design-luminescence-control-and-theranostic-applications
#1
REVIEW
Bei Liu, Chunxia Li, Piaoping Yang, Zhiyao Hou, Jun Lin
808 nm-light-excited lanthanide (Ln(3+) )-doped nanoparticles (LnNPs) hold great promise for a wide range of applications, including bioimaging diagnosis and anticancer therapy. This is due to their unique properties, including their minimized overheating effect, improved penetration depth, relatively high quantum yields, and other common features of LnNPs. In this review, the progress of 808 nm-excited LnNPs is reported, including their i) luminescence mechanism, ii) luminescence enhancement, iii) color tuning, iv) diagnostic and v) therapeutic applications...
March 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28251268/cadmium-containing-quantum-dots-properties-applications-and-toxicity
#2
REVIEW
Dan Mo, Liang Hu, Guangming Zeng, Guiqiu Chen, Jia Wan, Zhigang Yu, Zhenzhen Huang, Kai He, Chen Zhang, Min Cheng
The marriage of biology with nanomaterials has significantly accelerated advancement of biological techniques, profoundly facilitating practical applications in biomedical fields. With unique optical properties (e.g., tunable broad excitation, narrow emission spectra, robust photostability, and high quantum yield), fluorescent quantum dots (QDs) have been reasonably functionalized with controllable interfaces and extensively used as a new class of optical probe in biological researches. In this review, we summarize the recent progress in synthesis and properties of QDs...
March 1, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28240879/lanthanide-activated-phosphors-based-on-4f-5d-optical-transitions-theoretical-and-experimental-aspects
#3
Xian Qin, Xiaowang Liu, Wei Huang, Marco Bettinelli, Xiaogang Liu
The synthesis of lanthanide-activated phosphors is pertinent to many emerging applications, ranging from high-resolution luminescence imaging to next-generation volumetric full-color display. In particular, the optical processes governed by the 4f-5d transitions of divalent and trivalent lanthanides have been the key to enabling precisely tuned color emission. The fundamental importance of lanthanide-activated phosphors for the physical and biomedical sciences has led to rapid development of novel synthetic methodologies and relevant tools that allow for probing the dynamics of energy transfer processes...
February 27, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28212121/identification-and-evaluation-of-clinically-significant-prostate-cancer-a-step-towards-personalized-diagnosis
#4
Adnan Ali, Alexander Hoyle, Esther Baena, Noel W Clarke
PURPOSE OF REVIEW: Prostate cancer (PCa) diagnostics are evolving rapidly. The quest to differentiate 'clinically significant' from 'clinically insignificant' disease has gathered momentum, leading to substantial change in traditional diagnostic approaches. Herein, we review the relevant information on currently available biomarkers and assess their ability to help physicians and patients in making a shared and personalized decision based on their individual risk of harbouring clinically significant disease...
February 16, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28205400/design-features-for-optimization-of-tetrapyrrole-macrocycles-as-antimicrobial-and-anticancer-photosensitizers
#5
EDITORIAL
Alejandra Martinez De Pinillos Bayona, Pawel Mroz, Connor Thunshelle, Michael R Hamblin
Photodynamic therapy (PDT) uses non-toxic dyes called photosensitizers (PS) and harmless visible light that combine to form highly toxic reactive oxygen species that kill cells. Originally, a cancer therapy, PDT, now includes applications for infections. The most widely studied PS are tetrapyrrole macrocycles including porphyrins, chlorins, bacteriochlorins, and phthalocyanines. The present review covers the design features in PS that can work together to maximize the PDT activity for various disease targets...
February 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28165167/slow-photons-for-photocatalysis-and-photovoltaics
#6
REVIEW
Jing Liu, Heng Zhao, Min Wu, Benoit Van der Schueren, Yu Li, Olivier Deparis, Jinhua Ye, Geoffrey A Ozin, Tawfique Hasan, Bao-Lian Su
Solar light is widely recognized as one of the most valuable renewable energy sources for the future. However, the development of solar-energy technologies is severely hindered by poor energy-conversion efficiencies due to low optical-absorption coefficients and low quantum-conversion yield of current-generation materials. Huge efforts have been devoted to investigating new strategies to improve the utilization of solar energy. Different chemical and physical strategies have been used to extend the spectral range or increase the conversion efficiency of materials, leading to very promising results...
February 6, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28067991/all-inorganic-halide-perovskites-nanosystem-synthesis-structural-features-optical-properties-and-optoelectronic-applications
#7
Xiaoming Li, Fei Cao, Dejian Yu, Jun Chen, Zhiguo Sun, Yalong Shen, Ying Zhu, Lin Wang, Yi Wei, Ye Wu, Haibo Zeng
The recent success of organometallic halide perovskites (OHPs) in photovoltaic devices has triggered lots of corresponding research and many perovskite analogues have been developed to look for devices with comparable performance but better stability. Upon the preparation of all inorganic halide perovskite nanocrystals (IHP NCs), research activities have soared due to their better stability, ultrahigh photoluminescence quantum yield (PL QY), and composition dependent luminescence covering the whole visible region with narrow line-width...
January 9, 2017: Small
https://www.readbyqxmd.com/read/27992172/emissive-molecular-aggregates-and-energy-migration-in-luminescent-solar-concentrators
#8
James L Banal, Bolong Zhang, David J Jones, Kenneth P Ghiggino, Wallace W H Wong
Luminescent solar concentrators (LSCs) are light harvesting devices that are ideally suited to light collection in the urban environment where direct sunlight is often not available. LSCs consist of highly luminescent compounds embedded or coated on a transparent substrate that absorb diffuse or direct solar radiation over a large area. The resulting luminescence is trapped in the waveguide by total internal reflection to the thin edges of the substrate where the concentrated light can be used to improve the performance of photovoltaic devices...
December 19, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27968720/fluorescence-detection-of-pesticides-using-quantum-dot-materials-a-review
#9
REVIEW
S A Nsibande, P B C Forbes
High pesticide use, especially in agriculture, can lead to environmental pollution and potentially adverse health effects. As result, pesticide residues end up in different media, including water and food products, which may serve as direct routes for human exposure. There is thus a continuous drive to develop analytical methods for screening and quantification of these compounds in the different environmental media in which they may occur. Development of quantum dot (QD) based sensors for monitoring pesticides has gained momentum in recent years...
November 16, 2016: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27914582/photochemistry-of-nanoporous-carbons-perspectives-in-energy-conversion-and-environmental-remediation
#10
REVIEW
Alicia Gomis-Berenguer, Leticia F Velasco, Inmaculada Velo-Gala, Conchi O Ania
The interest in the use of nanoporous carbon materials in applications related to energy conversion and storage, either as catalysts or additives, has grown over recent decades in various disciplines. Since the early studies reporting the benefits of the use of nanoporous carbons as inert supports of semiconductors and as electron acceptors that enhance the splitting of the photogenerated excitons, many researchers have investigated the key role of carbon matrices coupled to all types of photoactive materials...
March 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27879628/carbon-based-materials-for-photo-triggered-theranostic-applications
#11
REVIEW
Karunya Albert, Hsin-Yun Hsu
Carbon-based nanomaterials serve as a type of smart material for photo-triggered disease theranostics. The inherent physicochemical properties of these nanomaterials facilitate their use for less invasive treatments. This review summarizes the properties and applications of materials including fullerene, nanotubes, nanohorns, nanodots and nanographenes for photodynamic nanomedicine in cancer and antimicrobial therapies. Carbon nanomaterials themselves do not usually act as photodynamic therapy (PDT) agents owing to the high hydrophobicity, however, when the surface is passivated or functionalized, these materials become great vehicles for PDT...
November 20, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27818904/lanthanide-doped-upconversion-nanoparticles-emerging-intelligent-light-activated-drug-delivery-systems
#12
Ali Bagheri, Hamidreza Arandiyan, Cyrille Boyer, May Lim
The development of drug delivery systems (DDSs) using near infrared (NIR) light and upconversion nanoparticles (UCNPs) has generated intensive interest over the past five years. These NIR-initiated DDSs not only offer a high degree of spatial and temporal determination of therapeutic release but also provide precise control over the released dosage. Furthermore, these nanoplatforms confer several advantages over conventional light-based DDSs-NIR offers better tissue penetration depth and a reduced risk of cellular photo-damage caused by exposure to light at high-energy wavelengths (e...
July 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27812463/structure-and-growth-control-of-organic-inorganic-halide-perovskites-for-optoelectronics-from-polycrystalline-films-to-single-crystals
#13
Yani Chen, Minhong He, Jiajun Peng, Yong Sun, Ziqi Liang
Recently, organic-inorganic halide perovskites have sparked tremendous research interest because of their ground-breaking photovoltaic performance. The crystallization process and crystal shape of perovskites have striking impacts on their optoelectronic properties. Polycrystalline films and single crystals are two main forms of perovskites. Currently, perovskite thin films have been under intensive investigation while studies of perovskite single crystals are just in their infancy. This review article is concentrated upon the control of perovskite structures and growth, which are intimately correlated for improvements of not only solar cells but also light-emitting diodes, lasers, and photodetectors...
April 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/27796044/firefly-luciferase-based-fusion-proteins-and-their-applications-in-bioanalysis
#14
REVIEW
Daria V Smirnova, Natalia N Ugarova
Firefly luciferase is widely used in molecular biology and bioanalytical systems as a reporter molecule due to the high quantum yield of the bioluminescence, availability of stable mutant forms of the enzyme with prescribed spectral characteristics and abundance of bacterial expression systems suitable for production of recombinant proteins in limitless quantities. In this review, we described fusion proteins of luciferase with biotin-binding domain and streptavidin, with proteins A and G, antibodies, with DNA- and RNA-binding proteins, as well as fusion proteins designed for BRET systems...
March 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/27754659/photoinduced-chemistry-in-fluorescent-proteins-curse-or-blessing
#15
Atanu Acharya, Alexey M Bogdanov, Bella L Grigorenko, Ksenia B Bravaya, Alexander V Nemukhin, Konstantin A Lukyanov, Anna I Krylov
Photoinduced reactions play an important role in the photocycle of fluorescent proteins from the green fluorescent protein (GFP) family. Among such processes are photoisomerization, photooxidation/photoreduction, breaking and making of covalent bonds, and excited-state proton transfer (ESPT). Many of these transformations are initiated by electron transfer (ET). The quantum yields of these processes vary significantly, from nearly 1 for ESPT to 10(-4)-10(-6) for ET. Importantly, even when quantum yields are relatively small, at the conditions of repeated illumination the overall effect is significant...
October 18, 2016: Chemical Reviews
https://www.readbyqxmd.com/read/27722695/dna-templated-silver-nanoclusters-structural-correlation-and-fluorescence-modulation
#16
S Y New, S T Lee, X D Su
12 years after the introduction of DNA-templated silver nanoclusters (DNA-AgNCs), exciting progress has been made and yet we are still in the midst of trying to fully understand this nanomaterial. The prominent excellence of DNA-AgNCs is undoubtedly its modulatable emission property, of which how variation in DNA templates causes emission tuning remains elusive. Based on the up-to-date DNA-AgNCs, we aim to establish the correlation between the structure/sequence of DNA templates and emission behaviour of AgNCs...
October 7, 2016: Nanoscale
https://www.readbyqxmd.com/read/27687584/colloidal-nanocrystals-embedded-in-macrocrystals-methods-and-applications
#17
Marcus Adam, Nikolai Gaponik, Alexander Eychmüller, Talha Erdem, Zeliha Soran-Erdem, Hilmi Volkan Demir
Colloidal semiconductor nanocrystals have gained substantial interest as spectrally tunable and bright fluorophores for color conversion and enrichment solids. However, they suffer from limitations in processing their solutions as well as efficiency degradation in solid films. As a remedy, embedding them into crystalline host matrixes has stepped forward for superior photostability, thermal stability, and chemical durability while simultaneously sustaining high quantum yields. Here, we review three basic methods for loading the macrocrystals with nanocrystals, namely relatively slow direct embedding, as well as accelerated methods of vacuum-assisted and liquid-liquid diffusion-assisted crystallization...
October 4, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27485129/engineered-nanomaterial-mediated-changes-in-the-metabolism-of-terrestrial-plants
#18
REVIEW
Mehrnaz Hatami, Khalil Kariman, Mansour Ghorbanpour
Engineered nanomaterials (ENMs) possess remarkable physicochemical characteristics suitable for different applications in medicine, pharmaceuticals, biotechnology, energy, cosmetics and electronics. Because of their ultrafine size and high surface reactivity, ENMs can enter plant cells and interact with intracellular structures and metabolic pathways which may produce toxicity or promote plant growth and development by diverse mechanisms. Depending on their type and concentration, ENMs can have positive or negative effects on photosynthesis, photochemical fluorescence and quantum yield as well as photosynthetic pigments status of the plants...
November 15, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27406265/nile-red-and-nile-blue-applications-and-syntheses-of-structural-analogues
#19
Vincent Martinez, Maged Henary
Nile red and Nile blue are highly fluorescent and photostable organic dyes from the benzo[a]phenoxazine family. They have been used as histological stains for imaging lysosomes and lipids in vitro. The dyes' high quantum yields and solvent-dependent optical properties make them ideal scaffolds for the development of pH probes and local polarity indicators. Reviews of the literature in this area are scarce with only one review ever published in 2006. It has been 10 years since and the field has evolved. This review aims to expand upon topics covered by the previous reviewers and to report on recent advances in the literature...
July 13, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27345736/lanthanide-ion-doped-upconverting-nanoparticles-synthesis-structure-and-properties
#20
Chenglin Yan, Haiguang Zhao, Dmitrii F Perepichka, Federico Rosei
Lanthanide doped upconverting nanoparticles (UCNPs) have emerged as a new class of luminescent materials, with major discoveries and overall significant progress during the last decade. Unlike multiphoton absorption in organic dyes or semiconductor quantum dots, lanthanide doped UCNPs involve real intermediate quantum states and convert infrared (IR) into visible light via sequential electronic excitation. The relatively high efficiency of this process even at low radiation flux makes UCNPs particularly attractive for many current and emerging areas of technology...
August 2016: Small
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