Article
Nanoscience & Nanotechnology
Chien-Yu Chen, Chia-Chun Ni, Ruei-Nan Wu, Sheng-Yang Kuo, Chia-Hao Li, Yean-Woei Kiang, C. C. Yang
Summary: The study reveals that surface plasmon coupling reduces FRET efficiency and creates competition. While R6G emission efficiency can be enhanced through SP coupling, the enhancement decreases when R6G is linked onto QD and then self-assembled onto Ag NP, especially when the number of R6G molecules is high.
Article
Chemistry, Multidisciplinary
Yanping Wang, Yusen Yang, Dingke Zhang, Tong Zhang, Shiyi Xie, Yu Zhang, Yong-Biao Zhao, Xiaoyun Mi, Xiuling Liu
Summary: This study reports an exciton sensitizing approach to improve the performance of quantum-dot light-emitting diodes (QLEDs) by forming excitons on a phosphorescent-dye-doped layer and transferring their energies to adjacent quantum-dot layer. The fabricated red QLEDs using this method achieve record high efficiency and good stability.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Megan K. Dunlap, Duncan P. Ryan, Peter M. Goodwin, Chris J. Sheehan, James H. Werner, Somak Majumder, Jennifer A. Hollingsworth, Martin P. Gelfand, Alan Van Orden
Summary: Time-resolved super-resolution microscopy and scanning electron microscopy were combined to image individual CdSe/CdS quantum dots and quantum dot dimers. Nanometer scale spatial resolution and sub-nanosecond time resolution were used to acquire photoluminescence lifetimes, intensities, and structural parameters. The combination of these techniques allowed for the resolution of photoluminescence properties of individual quantum dots within dimers, measurement of interparticle distances, and identification of quantum dots involved in energy transfer.
Article
Biophysics
Ganapathi Bharathi, Fangrui Lin, Liwei Liu, Tymish Y. Ohulchanskyy, Rui Hu, Junle Qu
Summary: Ovarian cancer is a deadly disease threatening women's health, and late diagnosis is a major reason for related deaths. Using HE4 as a biomarker can improve the accuracy of ovarian cancer diagnosis. Developing an all-graphene quantum dot FRET probe allows for ratiometric detection of the HE4 ovarian cancer biomarker.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Yen-Po Chen, Chia-Chun Ni, Ruei-Nan Wu, Sheng-Yang Kuo, Yu-Cheng Su, Yang-Yi Huang, Jia-Wei Chen, Yi-Chiao Hsu, Shung-Hsiang Wu, Chien-Yu Chen, Ping-Hsiu Wu, Yean-Woei Kiang, C. C. Yang
Summary: By forming nanodisk structures on a blue-emitting InGaN/GaN quantum-well template, the efficiency of blue-to-red color conversion can be enhanced. A larger nanodisk height leads to more quantum wells exposed on the sidewall, resulting in higher color conversion efficiency. The strong FRET process and SP coupling effects can enhance the efficiency of blue-to-red color conversion.
Article
Materials Science, Multidisciplinary
A. Rivera, Z. Lazcano, A. L. Gonzalez, O. Meza
Summary: This work investigates the plasmon resonances in gold and silver nanoparticles to enhance the luminescent properties of PMMA doped with different rare-earth ion densities. A rate equation model based on the Fo(r)ster theory is used to describe the luminescent dynamics between donor and acceptor rare earth ions and takes into account the electric field changes due to metallic nanoparticles. The results show that the luminescence of rare earth can be increased in the proximity of spherical gold and silver nanoparticles due to changes in the optical field and transition rates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tae Won Nam, Yeonkyung Park, Yeon Sik Jung, Hyun Gyu Park
Summary: In this study, a polychromatic quantum dot array (PQDA) was developed for accurate quantification of multiple miRNAs. The PQDA, manufactured using advanced patterning techniques, showed a wide dynamic range and high specificity, enabling the identification of target miRNAs with high sensitivity.
Article
Nanoscience & Nanotechnology
Monica G. Simoes, Georg Urstoeger, Robert Schennach, Ulrich Hirn
Summary: Adhesion occurs at nanoscale contact between surfaces, which can be evaluated using FRET spectroscopy/microscopy within a range of 1-10 nm. Increased pressure during film pressing leads to higher NSC and adhesion force/energy. FRET microscopy enables visualization of local variations in molecular contact.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Yang Liu, Jiaojiao Zheng, Wencai Liu, Zhiqin Yuan, Chao Lu
Summary: This review focuses on the recent advances and applications of steady-state and dynamic bioanalysis based on carbon quantum dots (CQDs) as luminescent probes. The synthesis and luminescence mechanism of CQDs are first introduced, followed by the discussion of sensing principles and tactics in CQD-based luminescent bioanalysis. Steady-state bioanalysis systems and dynamic bioanalysis platforms are discussed, and challenges and future trends are also addressed.
Article
Chemistry, Multidisciplinary
Subha Jana, Xiangzhen Xu, Andrey Klymchenko, Andreas Reisch, Thomas Pons
Summary: The Whispering gallery mode (WGM) microcavities are potential candidates in biosensing applications as their resonance wavelengths shift with changes in the refractive index. They offer high-quality resonance modes and accessible surface functionalities, making them promising for molecular assays, but their high sensitivity also makes them inherently unstable. The WGM resonances are also shown to strongly enhance fluorescence energy transfer between donors and acceptors, providing a potentially powerful class of biosensors combining sensitivity and simple detection schemes.
Article
Chemistry, Multidisciplinary
Xiaotong Fan, Shuli Wang, Xiao Yang, Chenming Zhong, Guolong Chen, Changzhi Yu, Yihang Chen, Tingzhu Wu, Hao-Chung Kuo, Yue Lin, Zhong Chen
Summary: This study proposes a bicomponent perovskite nanocomposite (BPNC) for color conversion layers in micro-light-emitting-diode (micro-LED) arrays, which significantly enhances the photoluminescence intensity through the built-in Forster resonance energy transfer (FRET) from the core CsPbBr3 to the shell gamma-CsPbI3. The FRET is conducted through a pair of combined quasi-degenerate energy levels in the blue spectra region, resulting in high excitation wavelength selectivity. The BPNC exhibits the brightest single-peak red photoluminescence with near 100% quantum yield and is adaptable to a wide range of emission wavelengths when used as color downconversion layers in a blue micro-LED array.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Analytical
Marketa Prochazkova, Eliska Kuchovska, Michael Killinger, Karel Kleparnik
Summary: In this study, a molecular probe based on Fo center dot rster resonance energy transfer (FRET) was designed and synthesized for investigating biological phenomena at a single-cell level. The probe utilizes a highly luminescent quantum dot (QD) as a donor and a specific peptide as a linker to a fluorophore or fluorescence quencher as an acceptor. The synthesized probe showed high reaction yield and specificity, and provided longer imaging times of caspases compared to commercial products.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Takahisa Omata, Hiroshi Asano, Masahiro Sakai, Yoshikazu Terai, Masao Kita
Summary: The research found that the valley splitting of PbSe quantum dots can be significantly enhanced by controlling the thickness of the CdSe shell in varying inter-QD distances. When the inter-QD distance is large, Forster resonance energy transfer causes a redshift in photoluminescence emission.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Biomedical
Mixiao Tan, Xuemei Li, Hua Zhang, Min Zheng, Jie Xiong, Yang Cao, Guoliang Cao, Zhigang Wang, Haitao Ran
Summary: An anchored tumor-homing cell-penetrating peptide (PEGA-pVEC) and PANI-ES/HMME loaded FRET nanobullet (AHP-P) is reported for synergistic photodynamic and photothermal therapy. The nanobullet can achieve targeted delivery, release of the therapeutic agent in the acidic tumor microenvironment, and enable efficient photothermal conversion and photodynamic therapy. In vivo studies showed significant tumor regression and reduced skin phototoxicity.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Biophysics
Qian Zhang, Chen-chen Li, Fei Ma, Xiliang Luo, Chun-yang Zhang
Summary: In this research, a catalytic single-molecule FRET biosensor was constructed for the detection of UDG activity. This biosensor amplifies the signal and completes the reaction in one step, simplifying the assay procedure and reducing the assay time.
BIOSENSORS & BIOELECTRONICS
(2022)