Results 51 to 60 of about 3,807 (195)

Enhanced upconversion emission in Nd, Yb, Er and Ho tetra-doped Y2O3 phosphor

Results in Optics
Yb3+, Nd3+, Er3+ and Ho3+ tetra ions doped Y2O3 upconversion phosphors have been prepared by the combustion route. Crystalline phase purity and cubic phase of prepared samples have been confirmed from powder X-ray diffraction study. Absorbance of samples
Harsha S. Deshmukh, Gajanan G. Muley
doaj   +1 more source

Bridging Boltzmann and Non‐Boltzmann Optical Thermometry Enabled by Multimodal Perovskite Nanocrystals

Advanced Optical Materials, EarlyView.
Multimodal perovskite nanocrystals enable optical thermometry across multiple excitation and emission regimes, spanning the UV–Vis–NIR spectral range. By combining upconversion, downshifting, and persistent luminescence, the platform bridges conventional Boltzmann and non‐Boltzmann thermometric approaches.
Adrian Drozdowski, Kevin Soler‐Carracedo, Tomasz Grzyb   +2 more
wiley   +1 more source

Neodymium‐Doped Nanocrystals for Sensing Cellular Temperature at the Nanoscale

Advanced Optical Materials, EarlyView.
Neodymium‐doped NaYF4 nanocrystals are engineered as bright, biocompatible nanothermometers for intracellular temperature mapping. Their ratiometric near‐infrared emission enables highly sensitive, nanoscale thermal readouts in living cells. Combined with gold nanostars for photothermal therapy, they reveal pronounced subcellular heating heterogeneity ...
Maria Bravo, Sandra Krzyzowska, Shelly Yang, Dingchen Wen, Jana Zielinski, Farsai Taemaitree, Samantha Zaman, Alastair Stewart, Susana Rocha, Paul Mulvaney, Hiroshi Uji‐i, Beatrice Fortuni, Sam Brooke, James Hutchison   +13 more
wiley   +1 more source

Monodisperse upconversion GdF₃:Yb, Er rhombi by microwave-assisted synthesis

Nanoscale Research Letters, 2011
We have synthesized a variety of monodisperse colloidal GdF3:Yb, Er upconversion nanocrystals with different shape, size, and dopants by microwave-assisted synthesis. Typical upconversion emission from Er3+ was observed.
Nann Thomas, Wang Haiqiao
doaj  

Dual-Mode Induction of Tunable Circularly Polarized Luminescence from Chiral Metal-Organic Frameworks

Research, 2020
The general approach for fabricating solid-state materials showing circularly polarized luminescence (CPL) is still in its challenge. In this work, chiral metal-organic frameworks (MOFs) with full-color and white-color circularly polarized light emission
Tonghan Zhao, Jianlei Han, Xue Jin, Minghao Zhou, Yan Liu, Pengfei Duan, Minghua Liu   +6 more
doaj   +1 more source

NaYF₄: Yb,Er Upconversion Nanoparticles for Imaging: Effect on Red Blood Cells

Photonics, 2023
(1) Background: Upconversion nanoparticles (UCNPs) are a promising tool for biological tissue structure visualization and photodynamic therapy (PDT).
Anna A. Doronkina, Vyacheslav I. Kochubey, Anastasia V. Maksutova, Alexander B. Pravdin, Artem M. Mylnikov, Nikita A. Navolokin, Irina Yu. Yanina   +6 more
doaj   +1 more source

Bayesian‐Optimized Dual‐Mode Luminescence‐Based Optical Thermometry Enabled by Negative Thermal Expansion in Lu2(MoO4)3:Yb–Er–Tm Phosphor

Advanced Optical Materials, EarlyView.
A Bayesian optimization framework identifies the ideal composition for Lu2(MoO4)3:Yb–Er–Tm phosphors with minimal experimental trials. By leveraging the host's negative thermal expansion, the material achieves remarkable thermal quenching compensation.
Reiko Furukawa, Takuya Hasegawa, Tong Fang, Saneyuki Ohno, Tomoyo Goto, Yasushi Sato, Ayahisa Okawa, Shu Yin   +7 more
wiley   +1 more source

Smart Nanotechnologies for Multimodal Neuromodulation and Brain Interfacing

Advanced Science, EarlyView.
Recent advances in smart nanotechnologies are expanding the toolbox for brain interfacing, from wireless neuromodulation and high‐resolution sensing to targeted delivery within the central nervous system. By combining responsive nanomaterials with bioinspired design, these platforms enable multimodal interactions with neurons and glia, while also ...
Tommaso Curiale, Marie Celine Lefevre, Alessio Carmignani, Maria Cristina Ceccarelli, Matteo Battaglini, Attilio Marino, Gianni Ciofani   +6 more
wiley   +1 more source

Transcranial optogenetic brain modulator for precise bimodal neuromodulation in multiple brain regions

Nature Communications
Transcranial brain stimulation is a promising technology for safe modulation of brain function without invasive procedures. Recent advances in transcranial optogenetic techniques with external light sources, using upconversion particles and highly ...
Hyogeun Shin, Min-Ho Nam, Seung Eun Lee, Soo Hyun Yang, Esther Yang, Jin Taek Jung, Hyun Kim, Jiwan Woo, Yakdol Cho, Youngsam Yoon, Il-Joo Cho   +10 more
doaj   +1 more source

Luminescence and temperature-sensing properties of Li+, Na+, or K+, Tm3+, and Yb3+ co-doped Bi2WO6 phosphors

Reviews on Advanced Materials Science, 2023
A series of Li+, Na+, or K+, Tm3+, and Yb3+ co-doped Bi2WO6 upconversion phosphors were prepared by a high-temperature solid-phase method at 800°C for 3 h.
Xiakeer Arepati, Wang Linxiang, Maimaiti Munire, Feng Xin, Jiang Mengliang   +4 more
doaj   +1 more source