Article
Chemistry, Physical
Wei Huang, Xinyue Xiang, Luyue Jin, Yi He
Summary: In this study, dark-field microscopy was used to investigate the kinetics of single Cu2O microparticles for NO2 removal. Unexpectedly, an oscillating redox reaction between Cu2O microparticles and NO2 was observed. This finding provides a new avenue for studying structure-performance relationships.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
J. I. A. B. I. N. Wang, A. N. Z. H. Wang, X. I. N. G. Y. U. Yang, S. H. E. N. G. J. I. A. Wang, X. I. N. Z. H. E. Zeng, J. I. A. Y. U. Hao, J. I. A. N. Zhou, Y. A. N. R. U. Kou, C. H. O. N. G. Niu, T. A. O. Geng, W. E. I. M. I. N. Sun
Summary: This paper proposes a new design framework of long-period fiber grating (LPFG) sensors resistant to multi-parameter cross talk. By merging a section of hollow quartz capillary (HQC) with a single-mode fiber (SMF) periodically, the proposed device is able to resist cross talk among the strain, ambient refractive index, and vector bending. The novel Es-LPFG is promising in single-parameter sensing, mode-locked lasers, and frequency-locked gain flattening.
Article
Biology
Teemu P. Miettinen, Kevin S. Ly, Alice Lam, Scott R. Manalis
Summary: This study reveals that mammalian cells lose dry mass and increase dry mass density upon entering mitosis, with large non-genetic variability. These changes are reversed at the metaphase-anaphase transition, and dry mass continues to accumulate. Early mitotic cells increase lysosomal exocytosis, and inhibition of this process reduces dry mass loss and dry mass density increase. Overall, this work provides a new method for monitoring single-cell dry mass and density, and uncovers the connection between mitosis and extensive exocytosis-mediated secretion of cellular contents.
Article
Optics
Joao P. Santos, Joerg Bierlich, Jens Kobelke, Marta S. Ferreira
Summary: A fiber sensor based on a balloonlike silica capillary is proposed and demonstrated for simultaneous measurement of displacement and temperature. The sensor configuration with a hollow-core fiber and a balloon shape enhances the sensing performance. It provides high sensitivity to displacement and temperature, and is cost-effective with a simple fabrication process.
Article
Optics
Lin Zhang, Jiamin Liu, Jinlong Zhu, Hao Jiang, Shiyuan Liu
Summary: The dynamics of damage inside fused silica induced by a femtosecond laser was studied using a single-pulse ultrafast measurement system. It was found that there is a quantitative relationship between the size of the damaged area and the pulse energy, and the structure inside the damaged area evolves before the formation of a double-void structure.
Article
Multidisciplinary Sciences
Zachary A. Steelman, Zachary N. Coker, Anna Sedelnikova, Mark A. Keppler, Allen S. Kiester, Maria A. Troyanova-Wood, Bennett L. Ibey, Joel N. Bixler
Summary: This work combines quantitative phase imaging and Brillouin spectroscopy to develop a label-free image cytometry platform capable of measuring multiple biophysical properties of cells simultaneously without assuming underlying parameters. The validation results of this system across different cell populations suggest its potential applications in biophysics, cell biology, and medicine.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Nicolas Barre, Alexander Jesacher
Summary: Graded-index optical elements can shape light precisely and in specific ways. Recent advances in laser manufacturing offer possibilities for realizing three-dimensional graded-index volumes. This study presents an algorithmic approach for computing these elements, along with suitable cost functions for different designs.
Article
Optics
Cheng-Chih Hsu, Shih-Han Hung, Yu-Hsuan Lin, Min-Rui Wu
Summary: A reliable glucose concentration measurement system was proposed, which consisted of a circular heterodyne polarimeter and a reusable enzymatic sensor for determining glucose concentrations in aqueous solutions and human serum. The system offers high accuracy and stability, and the enzymatic sensor can be reused multiple times under optimal conditions.
Article
Optics
Haotian Zhang, Xiaoping Li, Hongzhong Cao, Yue Pan, Wendi Wu, Yunjie Xia, Rende Ma
Summary: This study utilizes hyperspectral measurement to investigate the refractive index of aqueous samples and the effect of dispersion on ultra-sensitive interferometers. Through the generation of hyperspectral data in the near-infrared region using a wavefront splitting fiber Mach-Zehnder interferometer, the refractive index of saline water is measured, and empirical dispersion equations are fitted. By considering both normal and abnormal dispersion, the theoretical sensitivity of phase compensated WFSF-MZI is in agreement with experimental results, providing a reference for designing dispersion sensitized optical refractive index sensors for detecting aqueous samples.
Article
Optics
Iltai Isaac Kim, Yang Lie, Jae Sung Park
Summary: Recent research successfully developed a 3-D ray tracing simulation to explain internal reflection from curved droplet liquid-air interfaces, exploring A-TIR characteristics using aperture size, working distance, and droplet surface coverage fraction parameters. A-TIR can effectively measure contact angles and droplet thickness without requiring a complex microscope setup, making it suitable for measuring single or arrays of micro or nanodroplets.
Article
Nanoscience & Nanotechnology
Jeremie Maire, Tomasz Necio, Emigdio Chavez-Angel, Martin F. Colombano, Juliana Jaramillo-Fernandez, Clivia M. Sotomayor-Torres, Nestor E. Capuj, Daniel Navarro-Urrios
Summary: Glass microspheres with diameters ranging from 10 to 60 μm were evaluated for their elastic and optical properties using two complementary contactless techniques. The results showed that the properties of the microspheres were reduced compared to the bulk material due to the fabrication process.
Article
Optics
Zhenyong Dong, Yaqi Jin, Guanbin Zhang, Jie Zhou, Chunyang Liu, Fengxiang Liu, Zhongchao Wei, Faqiang Wang, Chunhua Tan, Hongyun Meng
Summary: This paper proposes a single core-offset Mach-Zehnder interferometer coated with polyvinyl alcohol for simultaneous measurement of relative humidity and temperature. The experimental results show that the sensor has good repeatability and high sensitivity, with potential applications for RH and temperature measurement.
Article
Optics
Lin Zhang, Jiamin Liu, Wenqi Gong, Hao Jiang, Shiyuan Liu
Summary: A single pulse diffraction method was proposed to probe the plasma column evolution induced by femtosecond laser pulses. The plasma rapidly expands within 7 ps due to ionization, reaching a steady state with a diameter of about 80 μm. The method allows for the determination of free electron density and refractive index in the plasma region using physical models.
Article
Engineering, Multidisciplinary
Meng Huang, Chan Sun, Hongpeng Qin, Zhuqing Jiang
Summary: A method for measuring the refractive index of liquids using a single-shot dual-wavelength off-axis digital holographic microscopy system and a microfluidic chip is presented. The refractive index of the liquid can be directly calculated using the unwrapped phase map obtained at a synthesized wavelength, without the need for a reference liquid's refractive index. The method also avoids the influence of the accuracy of the known refractive index on the measurement. Experimental results confirm the accuracy and reliability of the measurement. It is expected that this approach will be used to detect real-time fluid parameters related to its refractive index.
Article
Optics
Yong Wei, Chunbiao Liu, Chunlan Liu, Lingling Li, Lei Hu, Yonghui Zhang, Xiaoling Zhao, Tianci Jiang, Rui Wang, Chen Shi
Summary: In this paper, a single-mode fiber curvature sensor based on surface plasmon resonance (SPR) is designed and fabricated. By bending the fiber, the curvature measurement is achieved by changing the incident angle and depth of the resonance valley. Experimental results show that a smaller cutoff wavelength leads to higher sensitivity in valley depth and narrower half height width (FWHM).