Article
Chemistry, Multidisciplinary
Levente Juhasz, Roberto D. Ortuso, Kaori Sugihara
Summary: The study utilized quantitative friction force microscopy to measure the response of polydiacetylene to lateral forces, revealing the necessity of applying shear forces to characterize it at the nanoscale. The experiment confirmed the erroneous nature of the hypothesis regarding the higher force sensitivity at the edges and discovered a correlation between mechanochromism and thermochromism.
Article
Spectroscopy
Erasto Armando Zaragoza-Contreras, Claudia Alejandra Hernandez-Escobar, Isis Rodriguez-Sanchez
Summary: The study on the chromatic behavior of a poly(10,12-pentacosadiinoic acid)/titanium dioxide (TiO2) nanocomposite revealed that the peak of carboxyl groups shifted with temperature but color change was not reversible, while hydrogen bond shifting was temperature-dependent but reversible. TiO2 was found to enhance thermochromic reversibility, contrary to previous reports. Computational chemistry showed that temperature-induced torsion affected hydrogen bond strength, consistent with experimental findings.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
Ayana Sugizaki, Keisuke Sato, Kazuyoshi Chiba, Kenta Saito, Masahiko Kawagishi, Yuri Tomabechi, Shalin B. Mehta, Hirokazu Ishii, Naoki Sakai, Mikako Shirouzu, Tomomi Tani, Sumio Terada
Summary: Biomolecular assemblies play a crucial role in cell physiology, with their function depending on the changes in molecular positions and orientations. Fluorescence polarization microscopy offers a promising solution by reporting the orientation of emission dipoles, providing insights into monitoring molecular orientation in real time within living cells.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Clemens Schulte, Vladimir Khayenko, Noah Frieder Nordblom, Franziska Tippel, Violetta Peck, Amit Jean Gupta, Hans Michael Maric
Summary: Protein-protein interactions are crucial for understanding physiology and pathology, with short linear motifs playing a key role. Current approaches for determining protein-peptide affinity have limitations, but the TRIC method presents a high-throughput way to analyze these interactions in solution. TRIC allows for the identification and mapping of protein interaction sites with varying affinities, providing a label-free method for determining binding affinities of unmodified peptide libraries.
Article
Biology
Yufeng Zhou, John H. Lewis, Zhe Lu, Kenton J. Swartz
Summary: This study successfully tracked the multistate conformational changes of the membrane protein AdiC using a high-resolution fluorescence-polarization-microscopy method. By monitoring the emission-polarization changes of a fluorophore label, four conformations of AdiC were resolved and their probabilities were quantified in the presence of different concentrations of the substrate arginine. The acquired data allowed for the determination of all equilibrium constants and provided insights into the energetic relations among the four states.
Article
Biochemical Research Methods
Dominic A. Helmerich, Gerti Beliu, Danush Taban, Mara Meub, Marcel Streit, Alexander Kuhlemann, Soeren Doose, Markus Sauer
Summary: This study demonstrates the use of time-resolved detection and photoswitching fingerprinting analysis to determine the number and distance of closely spaced fluorophores within the sub-10-nm range. The study also reveals the impact of resonance energy transfer between fluorophores on the localization probabilities of sub-10-nm fluorescence imaging.
Article
Chemistry, Multidisciplinary
Kristina Huebner, Himanshu Joshi, Aleksei Aksimentiev, Fernando D. Stefani, Philip Tinnefeld, Guillermo P. Acuna
Summary: The study introduces a new technique to determine the orientation of single fluorophores in DNA origami structures, providing insights into the relationship between the fluorophores, environment, and structure. Results indicate that the orientation of fluorophores is influenced more by the specific molecular environment than the type of fluorophore.
Article
Multidisciplinary Sciences
Yuhan Liang, Di Yi, Tianxiang Nan, Shengsheng Liu, Le Zhao, Yujun Zhang, Hetian Chen, Teng Xu, Minyi Dai, Jia-Mian Hu, Ben Xu, Ji Shi, Wanjun Jiang, Rong Yu, Yuan-Hua Lin
Summary: This study presents a strategy to break the in-plane symmetry of Pt/Co heterostructures by designing the orientation of Burgers vectors of dislocations, enabling field-free SOT switching of perpendicular magnetization components.
NATURE COMMUNICATIONS
(2023)
Article
Cell Biology
Eli Heber Martins dos Anjos, Maria Luiza Silveira Mello, Benedicto de Campos Vidal
Summary: Polarization microscopy was used to evaluate the birefringence and linear dichroism characteristics of collagen bundles in rat calcaneal tendons cultured on different substrates. The results showed that tendon explants cultivated on plastic substrates exhibited structural remodeling of collagen bundles and irregular alignment, which may have facilitated cell migration from the lateral regions. This phenomenon was not observed in tendon explants cultivated on glass substrates.
Article
Physics, Applied
Khalil Ur Rehman, Subir Das, Fu-Jen Kao
Summary: The work demonstrates contrast enhancement through polarization-resolved pump-probe microscopy by measuring spontaneous fluorescence loss induced by stimulated emission. The pump-probe measurement is compared with conventional fluorescence polarization microscopy, resulting in different anisotropy values attributed to the multiphoton mechanism. The pump-probe technique promises higher temporal resolution in lifetime measurements and enables more precise determination of the fluorescent molecules' rotational diffusion time constant.
APPLIED PHYSICS EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Denis Alikin, Anton Turygin, Andrei Ushakov, Mikhail Kosobokov, Yurij Alikin, Qingyuan Hu, Xin Liu, Zhuo Xu, Xiaoyong Wei, Vladimir Shur
Summary: This study demonstrates a strategy to control the formation of selective ferroelectric or ferroelastic domain walls in single-domain rhombohedral PMN-PT single crystals by varying the humidity level. The observed reduction in ferroelastic domain density during local switching is attributed to changes in electric field distribution and screening effectiveness.
Article
Acoustics
Eunwoo Park, Yong-Jae Lee, Chulhong Kim, Tae Joong Eom
Summary: Photoacoustic imaging (PAI) is a molecular-selective imaging technology based on optical absorption contrast. We present a DS-PA microscopy (DS-PAM) system that utilizes optical anisotropy contrast and molecular selectivity, and propose mathematical solutions to fully derive dichroic properties. The DS-PAM system and algorithms have great potential in various diagnostic fields.
Article
Materials Science, Multidisciplinary
Chih-Hsuan Hu, Vincent K. S. Hsiao, Chih-Chien Chu
Summary: In this study, the potential of porous silicon's anisotropic photoluminescence (PL) properties for detecting the chirality and optical activity of organic molecules is investigated. The results indicate that using an improved light-emitting diode light source provides a higher resolution for chiral structures and considerably improves the discrimination of chiral molecules compared to using a laser excitation source. The method developed in this study can also be used to determine the concentration of spiropyran molecules. Using the anisotropic PL properties of porous silicon for detecting the chirality and optical activity of organic molecules is a reliable and sensitive method.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Paloma Rodriguez-Sevilla, Graham Spicer, Ana Sagrera, Alejandro P. Adam, Alejo Efeyan, Daniel Jaque, Sebastian A. Thompson
Summary: Fast, accurate, reliable, and remote measurement of intracellular temperature is crucial for understanding cellular processes. Nanothermometers based on GFP provide temperature readouts from the analysis of its luminescence polarization, but their reliability is still debated. This study sheds light on the issue by identifying cell activity as a bias mechanism that affects the reliability of intranuclear thermal measurements using GFP and other widely used thermometers. It emphasizes the importance of judiciously assessing the performance and reliability of chosen intracellular thermometers to advance the field and ensure indisputable results.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Environmental
S. M. Mohammed Al-Azzawi, Oliver Knoop, E. Jorg Drewes
Summary: The interest in monitoring microplastics in the environment has grown, but the challenge lies in the interactions with complex environmental matrices, especially wastewater effluents rich in natural organic matter (NOM). Sample preparation methods are needed to remove NOM and minimize interference during analysis. This study successfully tagged and fractured microplastic particles to assess the effects of sample preparation methods. The results suggest that both Fenton and hydrogen peroxide methods can be used for small microplastic particles (1-10 μm), while hydrogen peroxide is more suitable for nanoplastics (<1 μm).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Jing Wang, Jane Betty Goh, M. Cynthia Goh, Neeraj Kumar Giri, Matthew F. Paige
Article
Optics
N. K. Giri, S. K. Singh, D. K. Rai, S. B. Rai
APPLIED PHYSICS B-LASERS AND OPTICS
(2010)
Article
Optics
K. Mishra, N. K. Giri, S. B. Rai
APPLIED PHYSICS B-LASERS AND OPTICS
(2011)
Article
Chemistry, Physical
Neeraj Kumar Giri, Concepcion P. Ponce, Ronald P. Steer, Matthew F. Paige
CHEMICAL PHYSICS LETTERS
(2014)
Article
Biochemical Research Methods
Neeraj Kumar Giri, Kavita Mishra, S. B. Rai
JOURNAL OF FLUORESCENCE
(2011)
Article
Optics
J. Suresh Kumar, K. Pavani, A. Mohan Babu, Neeraj Kumar Giri, S. B. Rai, L. Rama Moorthy
JOURNAL OF LUMINESCENCE
(2010)
Article
Chemistry, Physical
Kenneth P. Ghiggino, Neeraj Kumar Giri, Jordan Hanrieder, Jonathon D. Martell, Jens Mueller, Matthew F. Paige, Benjamin Robotham, Jedrzej Szmytkowski, Ronald P. Steer
JOURNAL OF PHYSICAL CHEMISTRY A
(2013)
Article
Engineering, Biomedical
Alemu Kebede, Abhimanyu Kumar Singh, Prashant Kumar Rai, Neeraj Kumar Giri, Awadhesh Kumar Rai, Geeta Watal, A. V. Gholap
LASERS IN MEDICAL SCIENCE
(2013)
Article
Chemistry, Physical
Neeraj K. Giri, Abhinandan Banerjee, Robert W. J. Scott, Matthew F. Paige, Ronald P. Steer
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2014)
Article
Chemistry, Inorganic & Nuclear
S. K. Singh, N. K. Giri, D. K. Rai, S. B. Rai
SOLID STATE SCIENCES
(2010)
Article
Spectroscopy
Neeraj Kumar Giri, S. B. Rai, Anita Rai
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2009)
Article
Materials Science, Ceramics
Amit K. Gupta, Priyanka Kumari, Aashish Prakash, Neeraj K. Giri, Rohit R. Shahi
Summary: In this study, a modified solid-state synthesis technique was optimized to synthesize a single spinel phase for a novel (CuNiTiZnFe)3O4 High Entropy Oxide (HEO), and its magnetic behavior was investigated. Pure spinel HEO was synthesized using different synthesis approaches. The synthesized HESO exhibited typical ferrimagnetic properties and had a high magnetization and coercivity compared to other HEOs. XPS analysis revealed the ionic states of different cations present in the (CuNiTiZnFe)3O4 HESO.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Santosh Kachhap, Neeraj Kumar Giri, Shruti, Rajiv Prakash, S. K. Singh
Summary: GdScO3 perovskite exhibits high thermal stability, high bandgap, and low phonon energy, making it ideal for optical applications such as infrared-to-visible photon upconversion emission. In this study, pristine and Yb3+, Er3+ co-doped GdScO3 nanocrystals were successfully synthesized at low temperatures, and their crystal structure, phase, and optical properties were analyzed. It was found that GdScO3 nanocrystals exhibit photon upconversion properties and can be used for non-contact luminescence-based temperature sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Amit K. Gupta, Kumar Shubham, Neeraj K. Giri, Rohit R. Shahi
Summary: The nanocrystalline High Entropy Oxide (HEO) of (CuNiZnAlFe)(3)O-4 type was synthesized using the sol-gel method, showing an inverse spinel phase and porous microstructure. It exhibited low specific capacitance and ferrimagnetic behavior in an aqueous electrolyte.
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)