Results 51 to 60 of about 5,067 (184)

Photoelectric Imaging of the Optically Inactive Charge State of Silicon‐Vacancy Defects in Diamond

Advanced Science, EarlyView.
Although the doubly negative charge state of the SiV center in diamond is predicted to ionize only in the ultraviolet and is therefore considered optically inaccessible, we demonstrate visible‐range photoelectric imaging enabled by a previously unrecognized regime of laser‐assisted tunneling. ABSTRACT The investigation of optically active point defects
Ilia Chuprina, Gergő Thiering, Emilie Bourgeois, Anna Ermakova, Dmitry Budker, Adam Gali, Milos Nesladek, Petr Siyushev, Fedor Jelezko   +8 more
wiley   +1 more source

Formation of Light‐Emitting Defects in Ag‐Based Memristors

Advanced Electronic Materials, EarlyView.
How does a memristor begin to emit light‐before it even conducts? This work reveals that nanoscale silver clusters form, diffuse, and aggregate during activation, driving early photoluminescence ahead of current flow. Linking these precursor dynamics to later electroluminescence, it uncovers the origins of light emission and enables precise control of ...
Diana Singh, Maciej Ćwierzona, Régis Parvaud, Sebastian Maćkowski, Alexandre Bouhelier   +4 more
wiley   +1 more source

Continuous Purification of mRNA Produced by In Vitro Transcription Using High Performance Countercurrent Membrane Purification

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Messenger ribonucleic acid (mRNA) therapeutics produced by in vitro transcription must be purified to remove residual enzymes and free nucleotides. This study examines the use of high‐performance countercurrent membrane purification (HPCMP) for the purification of mRNA therapeutics based on differences in the rate of diffusion across ...
Ziqiao Wang, Amin Javidanbardan, Ali Behboudi, Andrew L. Zydney   +3 more
wiley   +1 more source

Viscosity of concentrated mRNA solutions: Implications for downstream processing

Biotechnology Progress, EarlyView.
Abstract Messenger RNA (mRNA) therapeutics can be used to protect against infectious disease and for the treatment of cancers and genetic disorders. In order to obtain the desired therapeutic dosage, it is necessary to concentrate the mRNA to levels where the viscosity of the mRNA solutions can become significant.
Amin Javidanbardan, Fatemeh Najafi, Ziqiao Wang, Andrew L. Zydney   +3 more
wiley   +1 more source

A 250 m Direct Time-of-Flight Ranging System Based on a Synthesis of Sub-Ranging Images and a Vertical Avalanche Photo-Diodes (VAPD) CMOS Image Sensor

Sensors, 2018
We have developed a direct time-of-flight (TOF) 250 m ranging Complementary Metal Oxide Semiconductor (CMOS) image sensor (CIS) based on a 688 × 384 pixels array of vertical avalanche photodiodes (VAPD).
Yutaka Hirose, Shinzo Koyama, Motonori Ishii, Shigeru Saitou, Masato Takemoto, Yugo Nose, Akito Inoue, Yusuke Sakata, Yuki Sugiura, Tatsuya Kabe, Manabu Usuda, Shigetaka Kasuga, Mitsuyoshi Mori, Akihiro Odagawa, Tsuyoshi Tanaka   +14 more
doaj   +1 more source

Switchable Dual Emission of Luminescent Metal–Organic Framework@Nanoparticle Composites of EuBDC and ZrO‐Containing Hybrid Materials

European Journal of Inorganic Chemistry, EarlyView.
Luminescent metal–organic framework@nanoparticle composites show dual emission of both components EuBDC and zirconyl‐containing nanoparticles, being reversible, excitation energy‐dependent and solvatochromic switches. The chromaticity changes are fast, as no chemical transformation is involved and required as source of the dual emission.
Tobias Wehner, Joachim G. Heck, Claus Feldmann, Klaus Müller‐Buschbaum   +3 more
wiley   +1 more source

Rounded Monodisperse Fluorescent Nanodiamonds

Small, EarlyView.
Nanodiamond (ND) shape control using rapid molten‐nitrate etching is studied as a scale‐up method for monodispersed rounded particles. Optimal etching condition (567°C for 6 min) yields NDs with atomically stepped surfaces and reduced sp2 content. Compared to angular control, rounded NDs exhibit an increased proportion of luminescent particles (66% vs.
Helena Raabova, Ivan Rehor, Jan Havlik, Stuart Turner, Jan Stursa, Vladimira Petrakova, Michal Gulka, Petr Cigler   +7 more
wiley   +1 more source

Endocytosis‐independent cytosolic entry of messenger RNA via fluorous bilayer zippering attenuating Toll‐like receptor signaling and enables ischemic tissue salvage

Smart Molecules, EarlyView.
The present study establishes a paradigm shift in synthetic mRNA delivery through the convergence of three orthogonal chemistries—perfluoro‐acylation, bio‐orthogonal click cross‐linking, and disulfide reduction—within a single, modular polymer architecture. Abstract A fundamental constraint of conventional messenger RNA (mRNA) delivery systems is their
Yue Wang, Haitao Xie, Guoqing Xiang, Yanhua Li, Changgui Tong, Hongyan Cui, Qixian Chen, Haidong Li, Yan Zhao   +8 more
wiley   +1 more source

Ultrafast time‐resolved X‐ray absorption spectroscopy at FemtoMAX beamline

Journal of Synchrotron Radiation, EarlyView.
A new setup for femtosecond resolution X‐ray absorption spectroscopy with energy ranging from 2 to 15 keV is established.We report on the development and first experiments at a new X‐ray absorption spectroscopy (XAS) endstation at the FemtoMAX beamline of the MAX IV Laboratory.
Van-Thai Pham, Katharina Kubicek, Ahn Byungnam, Carl Ekström, David Kroon, Zhangatay Nurekeyev, Mohammed Sekkal, Axl Eriksson, Hyein Hwang, Anna Zymaková, Thanh Binh Nguyen, Minh-Huong Ha-Thi, Xuan Thang Vu, Yohei Uemura, Jörgen Larsson, Christian Bressler, Jens Uhlig   +16 more
wiley   +1 more source

Analytical Performance Modeling of InP-InGaAs Hetero-junction Avalanche Photodiode

Iraqi Journal of Physics, 2009
In this study, an analytical model depending on experimental results for InPInGaAs avalanche photodiode at low bias was presented and the characteristics of gain for this photodiode were determined directly by the impulse response.
الهام كاضم أونيس
doaj