Review
Instruments & Instrumentation
Hemanth Dinesan, S. Sunil Kumar
Summary: This review focuses on the development of laser-induced fluorescence (LIF) spectroscopy for trapped gas-phase molecular ions. It summarizes the current state-of-the-art techniques used for intrinsic fluorescence measurement and discusses the challenges and potential solutions for gas-phase ion experiments. The review suggests that borrowing measurement schemes from condensed-phase experiments and improving the signal-to-noise ratio by utilizing high-finesse optical cavities and high numerical aperture collection optics could greatly enhance the detection of weak gas-phase fluorescence emission.
APPLIED SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
Kirsty E. McGhee, Anton Putintsev, Rahul Jayaprakash, Kyriacos Georgiou, Mary E. O'Kane, Rachel C. Kilbride, Elena J. Cassella, Marco Cavazzini, Denis A. Sannikov, Pavlos G. Lagoudakis, David G. Lidzey
Summary: A simplified approach for fabricating high-reflectivity mirrors suitable for organic-semiconductor microcavity applications has been developed. This method was used to construct a microcavity with a molecular dye, revealing that the roughness of the hybrid mirror affects the collapse of the population above the condensation threshold.
SCIENTIFIC REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Xiaoping Zhang, Guiyong Jin, Zeshao Chen, Yunjie Wu, Qian Li, Pengfei Liu, Gaolei Xi
Summary: Mitochondria-targetable fluorescent chemosensors, Rhodamine-B and rhodamine 6G bearing syringaldehyde based receptors, were designed and synthesized for efficient chemosensing of Zinc(II) ions. These probes showed selective color change and fluorescence enhancement upon addition of Zinc(II) ions, making them applicable for the detection and quantification of Zinc(II) ions in mitochondria.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2022)
Article
Chemistry, Applied
Jinfang Zhang, Ling Chen, Quan Chen, Yinlong Yue, Qinghan Chen, Dejing Yin, Chi Zhang
Summary: In this study, a new photochromic organic molecule was successfully synthesized and applied to the construction of a photochromic luminescent sensor. The sensor showed high sensitivity in detecting Cu2+ and MnO4- in aqueous medium and demonstrated good recyclability.
Article
Plant Sciences
Tim Rammler, Frank Wackenhut, Johanna Rapp, Sven Zur Oven-Krockhaus, Karl Forchhammer, Alfred J. J. Meixner, Klaus Harter
Summary: Photosynthesis is a vital biological process that produces oxygen and is the foundation for various plant products. Measurement of photosynthetic properties can provide insights into the physiological conditions of organisms. A new method using an optical Fabry-Perot microcavity allows for the assessment of photosynthetic activity and properties for individual cyanobacteria.
Article
Physics, Fluids & Plasmas
Sheng-Chen Liu, Lin Cheng, Gui-Zhong Yao, Ying-Xiang Wang, Liang-You Peng
Summary: Almost every quantum circuit in current stage relies on two-qubit gates, which are crucial for quantum computing in any platform. In trapped-ion systems, entangling gates based on Molmer-Sorensen schemes are widely used, utilizing the collective motional modes of ions and laser-controlled internal states as qubits. The key to achieving high-fidelity and robust gates is minimizing entanglement between qubits and motional modes under various sources of errors. In this work, an efficient numerical method is proposed to search for high-quality solutions for phase-modulated pulses, which solves the problem through a combination of linear algebra and quadratic equations. The method demonstrates effectiveness up to 60 ions and overcomes convergence issues, meeting the gate design needs in current trapped-ion experiments.
Article
Physics, Applied
W. J. Setzer, M. Ivory, O. Slobodyan, J. W. Van der Wall, L. P. Parazzoli, D. Stick, M. Gehl, M. G. Blain, R. R. Kay, H. J. McGuinness
Summary: This study demonstrates fluorescence detection from a trapped ion using SPADs integrated with a microfabricated surface ion trap. High fidelity detection of Yb-174(+) ions is achieved, with a low dark count rate of 1.2 kcps. The fidelity is limited by laser scatter, dark counts, and heating effects on the ion position.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Mohan Singh Mehata
Summary: 7-hydroxyquinoline can exist in different forms and exhibit unique fluorescence properties in water, with metal ions causing fluorescence quenching. The presence of metal ions inhibits keto formation and tautomerization of 7-HQ.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Optics
Jiahui Zhang, Feng Xu, Ran An, Lin Wang, Min Jiang, Guanghui Wang, Yanqing Lu
Summary: The study proposes an efficient fluorescence excitation and collection system using an integrated GaN chip. The system utilizes a slot waveguide to confine excitation light and introduces a one-dimensional photonic crystal waveguide to filter out fluorescence signals and enable multiple excitations. Through numerical analysis, the total fluorescence collection efficiency is determined to be 15.93%. This study introduces the concept of an integrated chip fluorescence detection system, paving the way for miniaturized and portable devices in biomedical fluorescence detection.
CHINESE OPTICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yufei Zhang, Na Meng, Aijaz Ahmed Babar, Xianfeng Wang, Jianyong Yu, Bin Ding
Summary: The team introduced a multi-bioinspired patterned fog collector, drawing inspiration from the unique structures of the Namib desert beetle, honeycomb, and pitcher plant to efficiently collect fog water. The collector utilizes hydrophilic nanofibrous bumps and a hydrophobic slippery substrate to increase water collection efficiency, demonstrating a grid structure self-assembled from electrospun nanofibers.
Review
Engineering, Environmental
Wenting Li, Xinai Zhang, Xuetao Hu, Yongqiang Shi, Zhihua Li, Xiaowei Huang, Wen Zhang, Di Zhang, Xiaobo Zou, Jiyong Shi
Summary: A novel fluorescence sensing platform was developed for visual detection of cadmium ions, offering excellent stability and portability. The platform exhibited a wide linear range and sensitive detection limit, with the capability of portable analysis using a smartphone and showing anti-interference activities in complex matrix. Overall, this sensing platform has significant potential for evaluating the quality of marine bivalves polluted with Cd2+.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Multidisciplinary Sciences
Takashi Anazawa, Shuhei Yamamoto, Ryoji Inaba
Summary: An ultra-small nine-color spectrometer with high light throughput and sufficient spectral resolution has been developed for snapshot spectral imaging. It has the potential to be widely used in various fields.
SCIENTIFIC REPORTS
(2022)
Article
Optics
B. P. Ruzic, T. A. Barrick, J. D. Hunker, R. J. Law, B. K. McFarland, H. J. McGuinness, L. P. Parazzoli, J. D. Sterk, J. W. Van der Wall, D. Stick
Summary: In this paper, the impact of coherent motional excitation on the entangling-gate error in trapped-ion quantum computers is analyzed. The results show that a small amount of coherent displacement can erode gate performance, but this error can be suppressed by adjusting the relative phase or using Walsh modulation. Experimental data from transported ions is also used to analyze the impact of coherent displacement on gate error under realistic conditions.
Article
Chemistry, Multidisciplinary
Yuya Hiruta, Chun Xie, Hidehiko Shishido, Itaru Kitahara
Summary: This paper introduces a novel approach for estimating the 3D information of an observed scene utilizing a monocular image based on a catadioptric imaging system employing an omnidirectional camera and a spherical mirror. By employing a curved mirror, it is possible to capture a large area in a single observation. The proposed method focuses on a spherical or spherical cap-shaped mirror in the scene and estimates the mirror's position from the captured images, allowing for the estimation of the scene with great flexibility.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Sunny Tiwari, Adarsh B. Vasista, Diptabrata Paul, Shailendra K. Chaubey, G. V. Pavan Kumar
Summary: Experimental observation of beaming elastic and surface enhanced Raman scattering (SERS) emission from a bent-nanowire on a mirror (B-NWoM) cavity. The system utilized a self-assembled monolayer of molecules with a well-defined molecular orientation to achieve beaming SERS emission.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)