Article
Nanoscience & Nanotechnology
Carin R. Lightner, Filip Desmet, Daniel Gisler, Stefan A. Meyer, Ariel Francis Perez Mellor, Hannah Niese, Arnulf Rosspeintner, Robert C. Keitel, Thomas Burgi, Wouter A. Herrebout, Christian Johannessen, David J. Norris
Summary: Spectroscopic techniques can provide information about the chiral structure of molecules, but small errors in optical polarization control can lead to experimental artifacts. This study focuses on Raman optical activity (ROA) as an example and comprehensively investigates chiroptical artifacts. Based on the findings, standard controls are proposed to help researchers better understand, identify, and avoid experimental artifacts.
Article
Optics
Yunhan Wang, Shaojie Yang, Qianli Zhang, Yanyu Chen, Xiaolong Hu, Hong Zhang, Zhiyou Zhang
Summary: This article presents a high-precision and easy-to-set-up method for simultaneous detection of optical rotation (OR) and circular dichroism (CD) signals. The method utilizes two new intensity-contrast-ratio pointers to enhance the measurement range. Experimental validation shows the high precision of the method, which may contribute to the development of ultra-precision biosensing technologies.
Article
Engineering, Electrical & Electronic
Jingyi Shao, Lan Luo, Yu He, Jiacheng You, Yurong Liu, Yuyuan Wang, Zhiyou Zhang
Summary: This paper presents a high-precise measurement of optical rotatory dispersion (ORD) based on weak value amplification (WVA). By introducing parameter separation, ORD and circular dichroism (CD) can be measured separately, verifying the reliability and precision of the method with potential applications in various fields.
IEEE PHOTONICS JOURNAL
(2021)
Article
Chemistry, Analytical
Ondrej Vrtelka, Katerina Kralova, Marketa Fouskova, Lucie Habartova, Petr Hribek, Petr Urbanek, Vladimir Setnicka
Summary: More than one fifth of the world's population is affected by liver cirrhosis or other chronic liver diseases, leading to the inevitable occurrence of hepatocellular carcinoma (HCC) in some cases. However, lack of early diagnostic options results in HCC mortality being on par with its incidence. Unlike other types of cancer, the incidence of HCC is expected to increase in the future, emphasizing the need for an effective early diagnostic option. This study suggests that blood plasma analysis using a combination of chiroptical and vibrational spectroscopic methods could be the key to improving current diagnostic capabilities.
Article
Chemistry, Multidisciplinary
Juchao Yan, Reid W. Wilson, Jason T. Buck, David C. Grills, Eric W. Reinheimer, Tomoyasu Mani
Summary: Conjugated molecular chains can serve as molecular wires in various technologies, requiring a detailed understanding of the electronic energy landscape and electron dynamics within them. By combining time-resolved infrared detection with pulse radiolysis, we can gain insights into the energetics and dynamics of charges in these molecules, with nitrile nu(C≡N) bands acting as IR probes for charges. Additionally, quantifications of IR intensity and linewidth in nitrile-functionalized oligophenylenes provide unique and complementary information on the nature of charges, especially when excess charge is present.
Article
Physics, Multidisciplinary
Lupei Qin, Yingxin Liu
Summary: In this work, a comprehensive analysis is carried out for the weak-value-amplification (WVA) measurement in a single trapped Ca-40(+) ion system. The meter's shift, the distribution profile of the output data, and its variance width are investigated, and the quality of the WVA measurement is characterized using the signal-to-noise ratio criterion and the Fisher information. A detailed comparison with conventional measurement is presented. The study also explores the imaginary WVA measurement.
Article
Chemistry, Multidisciplinary
Alexander T. Martin, Shane M. Nichols, Veronica L. Murphy, Bart Kahr
Summary: Optical activity, beyond chiral molecules, offers a valuable perspective for understanding structure-property relationships, yet measuring optical activity in oriented molecules within crystals remains a challenge. New polarimetric methods are still needed to unpack the optical activity of crystals in general directions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Optics
Weining Liu, Yisen Wang, Hailu Luo
Summary: This paper demonstrates that the purely real weak value can also shift the frequency-domain pointer when using a broad-spectrum light source, due to the different postselection probability of different frequencies. The weak measurement with real weak value can be used for the estimation of time delay, and it is found to have the same high resolution as the standard weak measurement in some sensitive regions.
Article
Chemistry, Multidisciplinary
Andrew Salij, Randall H. Goldsmith, Roel Tempelaar
Summary: Circular dichroism (CD) is widely used as an optical probe for molecular structures, showing a complex connection with photonic spin states and quantum-mechanical degrees of freedom. Recent experiments on organic thin films have provided insight into the origins of CD, but a theory linking optical selection rules with the microscopic structure of molecules is still needed.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Yujing Guo, Shuyi Zhu, Haoming Bao, Hao Fu, Hongwen Zhang, Le Zhou, Yue Li, Weiping Cai
Summary: This study demonstrates the significant impact of interfacial defects on the SERS activity and provides important guidance for the design and fabrication of efficient SERS substrates.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ani Ozcelik, Daniel Aranda, Raquel Pereira-Cameselle, Maria Talavera, Berta Covelo, Fabrizio Santoro, Angeles Pena-Gallego, J. Lorenzo Alonso-Gomez
Summary: This study demonstrates the control of spiroconjugation and its effect on the chemical and photophysical properties of spirobifluorenes through peripheral functionalization, which is of significant importance in the field of organic electronics.
Article
Chemistry, Multidisciplinary
Fei Wang, Zexiang Han, Juehan Sun, Xuekang Yang, Xiaoli Wang, Zhiyong Tang
Summary: This study provides a comprehensive analysis of the ultrafast chiroptical response of chiral gold nano-oligomers using time-resolved polarimetric measurements. The results reveal significant differences in absorption intensity and hot carrier decay time upon polarized photopumping, which can be explained by a phenomenological model of helicity-resolved optical transitions. Additionally, the chiroptical signal can be switched by reversing the direction of the pump pulse, demonstrating versatile modulation of polarization selection in a single device.
ADVANCED MATERIALS
(2023)
Article
Optics
Yi Zheng, Mu Yang, Zheng-Hao Liu, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Summary: In this work, we demonstrate the capability of the Shack-Hartmann wavefront sensor to detect weak values of transverse momentum, extending its input states to partially coherent states and comparing it with the weak measurement wavefront sensor. Our findings have important applications in fundamental quantum physics and quantum metrology.
Article
Optics
Manchao Zhang, Jie Zhang, Chunwang Wu, Yi Xie, Ting Chen, Wei Wu, Pingxing Chen
Summary: This paper improves the precision of estimating an unknown parameter by introducing a precoupling process with properly chosen interaction operators. By tracking the meter wave functions, it is found that the improvement in estimation precision comes from a precoupling induced modulation of the meter wave function, reaching the most sensitive regime with respect to the parameter. The estimation error is effectively suppressed by averaging the estimations resulted from different initial meter states. These results are demonstrated through a numerical simulation compared to the standard weak-value amplification scheme.
Article
Optics
Yongsheng Wang, Wenshuai Zhang, Shizhen Chen, Shuangchun Wen, Hailu Luo
Summary: In this study, a multiple weak-value model is proposed in quantum weak measurement to improve measurement accuracy by introducing modified preselection states, particularly for broad-spectrum light sources.
Article
Engineering, Environmental
Dae Sik Choi, Sohee Lim, Jin-Sung Park, Chang-Ho Kim, Hanju Rhee, Minhaeng Cho
Summary: The article introduces a label-free multi-color coherent anti-Stokes Raman scattering (CARS) microscopy technique that enables separate imaging of internalized MPs and lipid droplets in live cells, providing a new method for studying the cellular transport and cytotoxicity of MPs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Noh Soo Han, JunWoo Kim, Tai Hyun Yoon, Minhaeng Cho
Summary: Transient absorption spectroscopy of ThT molecules in various solvents using ASOPS with synchronized femtosecond lasers revealed that vibrational coupling strengths are reduced in chlorine-containing solvents, leading to an increase in fluorescence quantum yield. The study demonstrates the potential of NUV-NUV and NUV-NIR ASOPS techniques for investigating ultrafast photochemical reactions in condensed phases.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
JunWoo Kim, Tu C. Nguyen-Phan, Alastair T. Gardiner, Tai Hyun Yoon, Richard J. Cogdell, Minhaeng Cho, Gregory D. Scholes
Summary: In this study, the exciton relaxation in a light-harvesting II complex was investigated using polarization-dependent two-dimensional electronic spectroscopy. The results identified the vibrational modes involved in the exciton relaxation process.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sohyun Park, Eunchan Kim, Youngjin Choi, Jiung Jang, Kyungwon Kwak, Minhaeng Cho, Hyo Jae Yoon
Summary: This study investigated the thermoresponse of odd-even effect in self-assembled monolayers (SAMs) of n-alkanethiolates on template-stripped gold using contact angle goniometry and vibrational sum frequency generation spectroscopy. The results showed that the odd-even effect disappeared upon heating in liquid-like SAMs, indicating increased structural disorder. However, in wax- and solid-like SAMs, opposite thermoresponse was observed for odd and even molecules, mitigating the odd-even effect.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Minhaeng Cho
Summary: Time-resolved IR pump-probe and 2D-IR spectroscopy are valuable tools to study ultrafast processes in solutions. However, long-time signals are often obscured by molecular photothermal effects. In this study, a model based on the thermal diffusion equation is used to describe the solute-solvent energy transfer process and analyze the molecular photothermal effects on IR-PP and 2D-IR signals. The results show that the heat dissipation from vibrationally excited molecules to the surroundings can provide information about the mechanisms involved in the energy transfer process.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Physical
Kwang Jin Lee, Rajesh Bera, Jooyoun Kang, Kwang Seob Jeong, Minhaeng Cho
Summary: The study investigates the radiative decay processes of semiconductor nanoplatelets (NPLs) and introduces the use of metamaterial structures for controlling their excitonic properties, especially in the edge-up configuration. The results show that while metamaterials have little effect on the exciton lifetime of face-down NPLs, they significantly reduce the exciton lifetime of edge-up NPLs. This can be explained by orientation-dependent image dipole interactions, where metamaterials inversely affect the net transition dipole moments of the two NPL configurations. These findings will facilitate the development of optoelectronic applications requiring active manipulation of exciton lifetimes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Dae Sik Choi, Hanju Rhee, Minhaeng Cho
Summary: This study demonstrates the usefulness of time- and frequency-resolved coherent anti-Stokes Raman scattering (CARS) spectroscopy with a time-delayed picosecond probe pulse in resolving the congested C-H stretching vibrational peaks of condensed organic matters. The results show that overlapping vibrational peaks of polymeric films and oily liquids, which are not easily distinguishable in spontaneous Raman spectroscopy, can be separated in the time-resolved CARS (tr-CARS) spectra. The enhanced spectral resolution is attributed to the effective suppression of faster Raman free-induction-decay components and instantaneous nonresonant background signals.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Nanoscience & Nanotechnology
Youngjin Choi, Hyeng Jin Kim, Eunchan Kim, Huiyeong Kang, Junhyeok Park, Young Rag Do, Kyungwon Kwak, Minhaeng Cho
Summary: Area-selective atomic layer deposition (AS-ALD) of insulating metallic oxide layers can be improved by enhancing the inhibition efficiency of alkanethiol self-assembled monolayers (SAMs) through a discontinuously temperature-controlled ALD technique. Temperature-dependent vibrational sum-frequency-generation spectroscopy reveals that the thermally induced formation of gauche defects in the SAMs deteriorates the inhibition efficiency. By incorporating self-healing and dissipation of thermally induced stress on the SAM structure, 60 ALD cycles (6.6 nm) are achieved, demonstrating the potential of this method to enhance the efficiency of AS-ALD as a nanopatterning technique.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Debabrata Chakraborty, Rupak Chatterjee, Saptarsi Mondal, Sabuj Kanti Das, Vipin Amoli, Minhaeng Cho, Asim Bhaumik
Summary: This study successfully synthesized nitrogen-rich porous organic polymers (POPs) with high adsorption capacity and selectivity under high pressure, high temperature, and humidity conditions, which show great potential for precombustion CO2 capture and H-2 purification.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chaiho Lim, Jonggu Jeon, Kwanghee Park, Chungwen Liang, Yeongseok Chae, Kyungwon Kwak, Minhaeng Cho
Summary: Understanding chemical exchange in carbonate-based electrolytes employed in Li-ion batteries is crucial for elucidating ion transport mechanisms. In this study, comprehensive investigations using 2D-IR spectroscopy and molecular dynamics simulations revealed that the observed cross-peaks in the picosecond 2D-IR spectra of LIB electrolytes predominantly arise from intermolecular vibrational excitation transfer processes between the carbonyl groups of Li-bound and free carbonate molecules. The limitations of using a picosecond 2D-IR spectroscopic technique to study chemical exchange and intermolecular vibrational excitation transfer processes were also discussed.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Analytical
Chanjong Park, Jong Min Lim, Seok-Cheol Hong, Minhaeng Cho
Summary: Infrared photothermal microscopy is a non-invasive and label-free imaging technique that has been used in various research areas. However, the narrow spectral width of the preferred excitation light source limits the molecular information obtained. Here, we introduce a two-color IR photothermal microscopy technique that overcomes this limitation and allows for the imaging and differentiation of two chemical species in live cells.
Article
Chemistry, Physical
Suin Choi, So Yeon Chun, Kyungwon Kwak, Minhaeng Cho
Summary: In this study, droplet formation and protein fibrillation were monitored using micro-Raman spectroscopy in combination with DIC microscopy, revealing changes in the hydration environment in the protein droplets during LLPS. These findings provide valuable insights into the molecular mechanisms of LLPS and LSPT processes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Kwang Jin Lee, Rajesh Bera, Jooyoun Kang, Kwang Seob Jeong, Minhaeng Cho
Summary: The fundamental characteristics of semiconductor nanoplatelets (NPLs) and their optical properties can be easily controlled by assembling highly anisotropic NPLs into stacks. The introduction of metamaterial structures allows for the manipulation of excitonic properties, particularly in edge-up NPLs where a significant reduction in exciton lifetime is observed. These findings will facilitate the development of optoelectronic applications that require active manipulation of exciton lifetimes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Jin-Sung Park, Il-Buem Lee, Hyeon-Min Moon, Seok-Cheol Hong, Minhaeng Cho
Summary: Researchers used a label-free interferometric scattering microscope to track cargo transportation in cells and discovered that cells employ strategies similar to human transportation systems to overcome transportation hurdles.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Minhaeng Cho
Summary: This article provides a detailed theoretical description of pure dephasing and quantum decoherence, and directly compares their connections. It is helpful for gaining a deeper understanding of ultrafast spectroscopy from a quantum mechanical perspective and the wave-particle duality of quantum objects interacting with their surrounding environments.
CHEMICAL PHYSICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Alexander M. Prophet, Kritanjan Polley, Gary J. Van Berkel, David T. Limmer, Kevin R. Wilson
Summary: The oxidation kinetics of iodide by ozone at the air-water interface is studied in single microdroplets. Molecular simulations and kinetic modeling are used to understand the underlying multiphase mechanism.
Article
Chemistry, Multidisciplinary
Rong Zhang, Jiajing Lan, Fei Wang, Shumei Chen, Jian Zhang
Summary: By utilizing 1,1'-ferrocene dicarboxylic acid as a chelating and surface protection ligand, we have synthesized multi-nuclear indium oxide clusters with varying nuclear sizes, including heptanuclear and thirteen-nuclear clusters. These clusters possess labile coordination sites, allowing for structural modification and self-assembly, resulting in the formation of various cluster structures.
Article
Chemistry, Multidisciplinary
Hui Wang, Hui Liu, Mingsen Wang, Jiaheng Hou, Yongjun Li, Yuancheng Wang, Yingjie Zhao
Summary: Two supramolecular complexes were prepared using CBs and M1, and their single-crystal structures were analyzed by SCXRD. The unexpected 1:2 self-assembly structure between M1 and CB[8] was discovered for the first time. These complexes exhibit unique photophysical properties and provide valuable information about the structure and photophysical properties of supramolecular complexes.
Article
Chemistry, Multidisciplinary
Chang-Hee Lee, Sookil Park, Sanggil Kim, Ji Young Hyun, Hyun Soo Lee, Injae Shin
Summary: The epidermal growth factor receptor (EGFR) is a cell-surface glycoprotein involved in cell proliferation and tumor development. This study used a fluorescently labeled EGFR to investigate its time-dependent endocytosis in live cells and found that appended glycans affect EGFR internalization. Additionally, the study detected sialic acid residues attached to EGFR on the live cell surface using FRET-based imaging. This research provides valuable insights into the cellular functions of EGFR.
Article
Chemistry, Multidisciplinary
Subhankar Sahu, Lokesh Kumar, Sumita Das, Dipti Gupta, Ruchi Anand
Summary: This study proposes a strategy that combines organic electronics with biosensor scaffolds to create a compact device for monitoring environmental aromatic pollution. By coupling biosensing protein MopR with an organic electrochemical transistor (OECT), a sensor module capable of efficient detection of phenol was designed. Exclusive phenol detection with minimal loss of sensitivity could be achieved in complex pollutant mixtures and real environmental samples.
Review
Chemistry, Multidisciplinary
Changseok Lee, Hyung-Joon Kang, Sungwoo Hong
Summary: The formation of C-N bonds through hydroamination reactions catalyzed by nickel hydrides has been a topic of recent interest. This approach offers a way to efficiently transform a variety of alkene and alkyne substrates into compounds enriched with C-N bonds. The review provides a concise overview of the underlying reaction mechanisms and aims to stimulate further progress in NiH-catalytic techniques and catalyst design.
Article
Chemistry, Multidisciplinary
Yueci Wu, Lu-Lu Sun, Hai-Hao Han, Xiao-Peng He, Weiguo Cao, Tony D. James
Summary: Drug-induced liver injury (DILI) is a common cause of acute liver failure in the USA and Europe, but most cases can be recovered or prevented by discontinuing the offending drug. Recent research has found that peroxynitrite (ONOO-) can be used as a potential indicator for early diagnosis of DILI, and there is an urgent need to establish a method to detect and track peroxynitrite in DILI cases. In this study, a FRET-based nano fluorescent probe CD-N-I was developed, which showed high selectivity and sensitivity in detecting peroxynitrite. The probe successfully detected exogenous peroxynitrite in live cells and endogenous peroxynitrite in APAP-induced liver injury of HepG2 cells.
Article
Chemistry, Multidisciplinary
Dmitry L. Lipilin, Mikhail O. Zubkov, Mikhail D. Kosobokov, Alexander D. Dilman
Summary: This article describes a direct photocatalytic method for the thiolation of unprotected acids, which was previously challenging. By using a thionocarbonate reagent with an N-O bond, the efficient conversion of carboxylic acids to thiols is achieved.
Article
Chemistry, Multidisciplinary
Jason Malenfant, Lucille Kuster, Yohann Gagne, Kouassi Signo, Maxime Denis, Sylvain Canesi, Mathieu Frenette
Summary: Raman microscopy can reveal compound-specific vibrational fingerprints without sample preparation. The combination of efficient theoretical calculations and a user-friendly software can accurately predict peak positions and provide match scores to assist with structure determination.
Article
Chemistry, Multidisciplinary
Jayoh A. Hernandez, Paul S. Micus, Sean Alec Lois Sunga, Luca Mazzei, Stefano Ciurli, Gabriele Meloni
Summary: Essential trace metals play crucial roles in the survival and virulence of bacterial pathogens. Helicobacter pylori requires nickel for colonization and persistence in the stomach, and NixA is an essential nickel transporter in this process. This study characterizes the selectivity and electrogenic nature of NixA-mediated nickel transport.
Article
Chemistry, Multidisciplinary
Tarali Devi, Kuheli Dutta, Jennifer Deutscher, Stefan Mebs, Uwe Kuhlmann, Michael Haumann, Beatrice Cula, Holger Dau, Peter Hildebrandt, Kallol Ray
Summary: This study emphasizes the importance of subtle electronic changes and secondary interactions in the stability of biologically relevant metal-dioxygen intermediates. It also shows that the role of the chloride ligand in stabilizing the Fe-III-(OOBu)-Bu-t moiety can extend to other anions, including the thiolate ligand.
Article
Chemistry, Multidisciplinary
Jacqueline R. Santhouse, Jeremy M. G. Leung, Lillian T. Chong, W. Seth Horne
Summary: By studying the folding kinetics and mechanism of the BdpA sequence, researchers found that altering the backbone connectivity can affect protein folding. This suggests that protein mimetic chains have a significant degree of plasticity in transitioning between unfolded and folded states.
Article
Chemistry, Multidisciplinary
Divanshu Gupta, Ralf Einholz, Holger F. Bettinger
Summary: This study presents the first direct spectroscopic evidence of a cyclic seven-membered iminoborane. Compared to linear amino-iminoboranes, this cyclic iminoborane exhibits weakened bond strength and lower Lewis acidity value. The study suggests that the reduced ring strain of cyclic iminoborane prevents nitrogen fixation but allows facile (2 + 2) cycloaddition reaction with C2H4.
Article
Chemistry, Multidisciplinary
Renny Mathew, Aniruddha Mazumder, Praveen Kumar, Julie Matula, Sharmarke Mohamed, Petr Brazda, Mahesh Hariharan, Brijith Thomas
Summary: This study reveals the packing arrangement of partially disordered nitro-perylenediimide (NO2-PDI) using a synergistic approach that combines 3D ED, ssNMR, and DFT techniques. By overcoming these challenges, this methodology opens up new avenues for material characterization, driving exciting advancements in the field.