Results 71 to 80 of about 124,588 (288)

Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor

, 2009
We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields (lin||lin configuration).
Belcher, Ben-Aroya, Breschi, Cyr, Erhard, Eugeniy E. Mikhailov, Fleischhauer, Griffith, Irina Novikova, Jau, Jau, Kazakov, Knappe, Knappe, Knappe, Knappe, Kominis, Kornack, Ledbetter, Merimaa, Mikhailov, Nathan Belcher, Novikova, Novikova, Phillips, Shah, Shah, Taichenachev, Taichenachev, Taichenachev, Travis Horrom, Vanier, Vanier, Xiao, Xiao, Yashchuk, Zanon, Zibrov, Zibrov   +38 more
core   +1 more source

Systematic Benchmarking of a Noise‐Tolerant Conductive Hydrogel Electrode for Epidermal Bioelectronics

Advanced Science, EarlyView.
General schematic of the approach. Abstract Conventional Silver/Silver Chloride (Ag/AgCl) electrodes remain the clinical standard for electrophysiological monitoring but are hindered by poor skin conformity, mechanical rigidity, and signal degradation, particularly under motion or sweat.
Nazmi Alsaafeen, Ioannis Ziogas, Shirina Alsaedi, Mouza Alshehhi, Shahd Almheiri, Adil Rehman, Khulood Al Shehhi, Hani Saleh, Ahsan Khandoker, Charalampos Pitsalidis, Antoun Khawaja, Anna‐Maria Pappa   +11 more
wiley   +1 more source

Stabilizing diode laser to 1 Hz-level Allan deviation with atomic spectroscopy for Rb four-level active optical frequency standard [PDF]

Applied Physics B, 2019
AbstractWe achieve a compact ultra-stable 420 nm blue diode laser system by immediately stabilizing the laser on the hyperfine transition line of Rb atom. The Allan deviation of the residual error signal reaches 1 Hz-level Allan deviation within 1 s averaging time, and the fractional frequency Allan deviation is$$1.4\times 10^{-15}/\sqrt{\tau }$$1.4×10-
Pengyuan Chang, Shengnan Zhang, Haosen Shang, Jingbiao Chen   +3 more
openaire   +1 more source

On the Origins of Toughness in Corymbia calophylla (Marri Tree) Nuts

Advanced Science, EarlyView.
We uncover the natural toughening mechanisms of the marri nut, including fiber pullout, crack deflection, and a viscoelastic matrix, which enable exceptional energy absorption and ductility comparable to Teflon, with an elastic modulus similar to acrylic.
Wegood M. Awad, Ahmed S. Dalaq, Marieh B. Al‐Handawi, Rezo Getsadze, Oraib Al‐Ketan, James Weston, Mohammed Daqaq, Panče Naumov   +7 more
wiley   +1 more source

Peptide Receptor‐Functionalized AuNP‐Embedded Zwitterionic Biopolymeric Nanohydrogel for Electrochemical Sclerostin Sensing

Advanced Science, EarlyView.
We report an electrochemical biosensor that employs biopanning‐derived affinity peptides as selective receptors on a multifunctional chitosan–zwitterionic–gold nanoparticle (CS–ZI–AuNPs) nanohydrogel interface. The CS–ZI–AuNPs nanohydrogel exhibits antifouling properties, abundant sites for stable peptide immobilization, and efficient electrochemical ...
Hyo Jeong Yang, Jae Hwan Shin, Mingi Jo, Changyeon Lee, Hyunmin Yi, Al‐Montaser Bellah H. Ali, Jong Pil Park   +6 more
wiley   +1 more source

Fluorine‐18‐Labeled Nucleotide Analogs Targeting Ecto‐5'‐Nucleotidase (CD73) for Positron Emission Tomography Imaging of Solid Tumors

Angewandte Chemie, EarlyView.
Fluorine‐18‐labeled CD73 inhibitor [18F]PSB‐19427 enables noninvasive PET mapping of CD73 overexpression in triple‐negative breast (TNBC) and pancreatic cancer. For [18F]PSB‐19427, specific binding in human tumor tissues, favorable biodistribution with prolonged blood retention, robust tumor uptake, and superiority to [18F]FDG in a TNBC model ...
Clemens Dobelmann, Constanze C. Schmies, Georg Wilhelm Rolshoven, Mirko Scortichini, Stefan Wagner, Andreas Isaak, Riham M. Idris, Jennifer Dabel, Lucie Grey, Karolina Losenkova, Susanne Moschütz, Haneen Al Hroub, Antje Keim, Sandra Höppner, Jouko Sandholm, Pia Boström, Maija Hollmén, Norbert Sträter, Sven Hermann, Gennady G. Yegutkin, Kenneth A. Jacobson, Sonja Schelhaas, Christa E. Müller, Anna Junker   +23 more
wiley   +2 more sources

Improving 795 nm Single-Frequency Laser’s Frequency Stability by Means of the Bright-State Spectroscopy with Rubidium Vapor Cell

Photonics
The utilization of atomic or molecular spectroscopy for frequency locking of single-frequency laser to improve laser frequency stability plays an important role in the experimental investigation of optically pumped atomic magnetometers, atomic clocks ...
Junye Zhao, Yongbiao Yang, Lulu Zhang, Yang Li, Junmin Wang   +4 more
doaj   +1 more source

Joint Frequency and Time Transfer Over Optical Fiber With High-Precision Delay Variation Measurement Using a Phase-Locked Loop

IEEE Photonics Journal, 2019
We demonstrate a simultaneous frequency and time reference dissemination system over 80 km fiber with a phase-locked loop. The phase fluctuation of the transferred radio-frequency (RF) signal is compensated by adjusting the frequency of the ...
Xiaocheng Wang, Wei Wei, Zhangweiyi Liu, Daming Han, Nan Deng, Lingwei Yang, Weilin Xie, Yi Dong   +7 more
doaj   +1 more source

Realization of a pulsed optically pumped Rb clock with a frequency stability below $$10^{-15}$$ 10 - 15

Scientific Reports, 2023
We present the frequency stability performances of a vapor cell Rb clock based on the pulsed optically pumping (POP) technique. The clock has been developed in the frame of a collaboration between INRIM and Leonardo SpA, aiming to realize a space ...
Michele Gozzelino, Salvatore Micalizio, Claudio E. Calosso, Jacopo Belfi, Adalberto Sapia, Marina Gioia, Filippo Levi   +6 more
doaj   +1 more source

Stretchable Energy Storage with Eutectic Gallium Indium Alloy

Advanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
A highly stretchable liquid metal‐based electrode is developed via a one‐step process, retaining conductivity and capacitance after mechanical deformation up to 900% strain. The stretchable all‐solid‐state device provides a areal energy density of 43 µWh cm⁻2 after 150% strain.
Adit Gupta, Noah Al‐Shamery, Jian Lv, Gurunathan Thangavel, Jinwoo Park, Daniel Mandler, Pooi See Lee   +6 more
wiley   +1 more source