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Статті в журналах з теми "Single Molecule Spectroscopy (SMS)"

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Автор: Grafiati

Опубліковано: 7 вересня 2023

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1

Thyrhaug, Erling, Stefan Krause, Antonio Perri, Giulio Cerullo, Dario Polli, Tom Vosch, and Jürgen Hauer. "Single-molecule excitation–emission spectroscopy." Proceedings of the National Academy of Sciences 116, no. 10 (February 15, 2019): 4064–69. http://dx.doi.org/10.1073/pnas.1808290116.

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Single-molecule spectroscopy (SMS) provides a detailed view of individual emitter properties and local environments without having to resort to ensemble averaging. While the last several decades have seen substantial refinement of SMS techniques, recording excitation spectra of single emitters still poses a significant challenge. Here we address this problem by demonstrating simultaneous collection of fluorescence emission and excitation spectra using a compact common-path interferometer and broadband excitation, which is implemented as an extension of a standard SMS microscope. We demonstrate the technique by simultaneously collecting room-temperature excitation and emission spectra of individual terrylene diimide molecules and donor–acceptor dyads embedded in polystyrene. We analyze the resulting spectral parameters in terms of optical lineshape theory to obtain detailed information on the interactions of the emitters with their nanoscopic environment. This analysis finally reveals that environmental fluctuations between the donor and acceptor in the dyads are not correlated.

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2

Karimullin, Kamil, and Andrei Naumov. "Low-temperature dynamics in a dye-doped polymer: correspondence between the data obtained by photon echo and single molecule spectroscopy." EPJ Web of Conferences 190 (2018): 04008. http://dx.doi.org/10.1051/epjconf/201819004008.

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Low temperature dynamics (tunneling and vibrational relaxation) in doped polyisobutylene film has been reinvestigated using 2-pulse incoherent photon echo (2IPE) and compared with single-molecule spectroscopy (SMS) data. It has been shown that in a very wide range of low temperatures the 2IPE gives optical dephasing times which correspond to the narrowest zero-phonon lines of single dye molecules.

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3

Li, Chao-Yu, Sai Duan, Jun Yi, Chen Wang, Petar M. Radjenovic, Zhong-Qun Tian, and Jian-Feng Li. "Real-time detection of single-molecule reaction by plasmon-enhanced spectroscopy." Science Advances 6, no. 24 (June 2020): eaba6012. http://dx.doi.org/10.1126/sciadv.aba6012.

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Determining structural transformations of single molecules (SMs) is an important fundamental scientific endeavor. Optical spectroscopies are the dominant tools used to unravel the physical and chemical features of individual molecules and have substantially contributed to surface science and biotechnology. In particular, Raman spectroscopy can identify reaction intermediates and reveal underlying reaction mechanisms; however, SM Raman experiments are subject to intrinsically weak signal intensities and considerable signal attenuation within the spectral dispersion systems of the spectrometer. Here, to monitor the structural transformation of an SM on the millisecond time scale, a plasmonic nanocavity substrate has been used to enable Raman vibrational and fluorescence spectral signals to be simultaneously collected and correlated, which thus allows a detection of photo-induced bond cleavage between the xanthene and phenyl group of a single rhodamine B isothiocyanate molecule in real time. This technique provides a novel method for investigating light-matter interactions and chemical reactions at the SM level.

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4

Malý, Pavel, J. Michael Gruber, Richard J. Cogdell, Tomáš Mančal, and Rienk van Grondelle. "Ultrafast energy relaxation in single light-harvesting complexes." Proceedings of the National Academy of Sciences 113, no. 11 (February 22, 2016): 2934–39. http://dx.doi.org/10.1073/pnas.1522265113.

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Energy relaxation in light-harvesting complexes has been extensively studied by various ultrafast spectroscopic techniques, the fastest processes being in the sub–100-fs range. At the same time, much slower dynamics have been observed in individual complexes by single-molecule fluorescence spectroscopy (SMS). In this work, we use a pump–probe-type SMS technique to observe the ultrafast energy relaxation in single light-harvesting complexes LH2 of purple bacteria. After excitation at 800 nm, the measured relaxation time distribution of multiple complexes has a peak at 95 fs and is asymmetric, with a tail at slower relaxation times. When tuning the excitation wavelength, the distribution changes in both its shape and position. The observed behavior agrees with what is to be expected from the LH2 excited states structure. As we show by a Redfield theory calculation of the relaxation times, the distribution shape corresponds to the expected effect of Gaussian disorder of the pigment transition energies. By repeatedly measuring few individual complexes for minutes, we find that complexes sample the relaxation time distribution on a timescale of seconds. Furthermore, by comparing the distribution from a single long-lived complex with the whole ensemble, we demonstrate that, regarding the relaxation times, the ensemble can be considered ergodic. Our findings thus agree with the commonly used notion of an ensemble of identical LH2 complexes experiencing slow random fluctuations.

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5

Kollmann, Heiko, Martin Esmann, Julia Witt, Aleksandra Markovic, Vladimir Smirnov, Gunther Wittstock, Martin Silies, and Christoph Lienau. "Fourier-transform spatial modulation spectroscopy of single gold nanorods." Nanophotonics 7, no. 4 (March 28, 2018): 715–26. http://dx.doi.org/10.1515/nanoph-2017-0096.

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AbstractSensing the scattered fields of single metallic nanostructures is a crucial step towards the applications of isolated plasmonic antennas, such as for the sensing of single molecules or nanoparticles. In the past, both near- and far-field spectroscopy methods have been applied to monitor single plasmonic resonances. So far, however, these spectral-domain techniques do not yet provide the femtosecond time resolution that is needed to probe the dynamics of plasmonic fields in the time domain. Here, we introduce a time-domain technique that combines broadband Fourier-transform spectroscopy and spatial modulation spectroscopy (FT-SMS) to quantitatively measure the extinction spectra of the isolated gold nanorods with a nominal footprint of 41×10 nm2. Using a phase-stable pulse pair for excitation, the technique is capable of rejecting off-resonant stray fields and providing absolute measurements of the extinction cross section. Our results indicate that the method is well suited for measuring the optical response of strongly coupled hybrid systems with high signal-to-noise ratio. It may form the basis for new approaches towards time-domain spectroscopy of single nanoantennas with few-cycle time resolution.

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6

Torres, Rubén, Begoña Carrasco, and Juan C. Alonso. "Bacillus subtilis RadA/Sms-Mediated Nascent Lagging-Strand Unwinding at Stalled or Reversed Forks Is a Two-Step Process: RadA/Sms Assists RecA Nucleation, and RecA Loads RadA/Sms." International Journal of Molecular Sciences 24, no. 5 (February 25, 2023): 4536. http://dx.doi.org/10.3390/ijms24054536.

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Replication fork rescue requires Bacillus subtilis RecA, its negative (SsbA) and positive (RecO) mediators, and fork-processing (RadA/Sms). To understand how they work to promote fork remodeling, reconstituted branched replication intermediates were used. We show that RadA/Sms (or its variant, RadA/Sms C13A) binds to the 5′-tail of a reversed fork with longer nascent lagging-strand and unwinds it in the 5′→3′ direction, but RecA and its mediators limit unwinding. RadA/Sms cannot unwind a reversed fork with a longer nascent leading-strand, or a gapped stalled fork, but RecA interacts with and activates unwinding. Here, the molecular mechanism by which RadA/Sms, in concert with RecA, in a two-step reaction, unwinds the nascent lagging-strand of reversed or stalled forks is unveiled. First, RadA/Sms, as a mediator, contributes to SsbA displacement from the forks and nucleates RecA onto single-stranded DNA. Then, RecA, as a loader, interacts with and recruits RadA/Sms onto the nascent lagging strand of these DNA substrates to unwind them. Within this process, RecA limits RadA/Sms self-assembly to control fork processing, and RadA/Sms prevents RecA from provoking unnecessary recombination.

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7

Tricase, Angelo, Anna Imbriano, Nicoletta Ditaranto, Eleonora Macchia, Rosaria Anna Picca, Davide Blasi, Luisa Torsi, and Paolo Bollella. "Electrochemical and X-ray Photoelectron Spectroscopy Surface Characterization of Interchain-Driven Self-Assembled Monolayer (SAM) Reorganization." Nanomaterials 12, no. 5 (March 4, 2022): 867. http://dx.doi.org/10.3390/nano12050867.

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Herein, we report a combined strategy encompassing electrochemical and X-ray photoelectron spectroscopy (XPS) experiments to investigate self-assembled monolayer (SAM) conformational reorganization onto an electrode surface due to the application of an electrical field. In particular, 3-mercaptopriopionic acid SAM (3MPA SAM) modified gold electrodes are activated with a 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysulfosuccinimide (NHSS) (EDC-NHSS) mixture by shortening the activation time, from 2 h to 15/20 min, labelled as Protocol-A, -B and -C, respectively. This step, later followed by a deactivation process with ethanolamine (EA), plays a key role in the reaction yields (formation of N-(2-hydroxyethyl)-3-mercaptopropanamide, NMPA) but also in the conformational rearrangement observed during the application of the electrical field. This study aims at explaining the high performance (i.e., single-molecule detection at a large electrode interface) of bioelectronic devices, where the 3MPA-based SAM structure is pivotal in achieving extremely high sensing performance levels due to its interchain interaction. Cyclic voltammetry (CV) experiments performed in K4Fe(CN)6:K3Fe(CN)6 for 3MPA SAMs that are activated/deactivated show similar trends of anodic peak current (IA) over time, mainly related to the presence of interchain hydrogen bonds, driving the conformational rearrangements (tightening of SAMs structure) while applying an electrical field. In addition, XPS analysis allows correlation of the deactivation yield with electrochemical data (conformational rearrangements), identifying the best protocol in terms of high reaction yield, mainly related to the shorter reaction time, and not triggering any side reactions. Finally, Protocol-C’s SAM surface coverage, determined by CV in H2SO4 and differential pulse voltammetry (DPV) in NaOH, was 1.29 * 1013 molecules cm−2, being similar to the bioreceptor surface coverage in single-molecule detection at a large electrode interface.

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8

Kilby, P. M., W. U. Primrose, and G. C. K. Roberts. "Changes in the structure of bovine phospholipase A2 upon micelle binding." Biochemical Journal 305, no. 3 (February 1, 1995): 935–44. http://dx.doi.org/10.1042/bj3050935.

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Phospholipase A2 (PLA2) is a calcium-dependent enzyme which hydrolyses the 2-acyl ester bond of phospholipids. The extracellular PLA2s are activated by as much as 10000-fold on binding to micelles or vesicles of substrate, possibly due to a conformational change induced in the enzyme. We have studied the complex of bovine pancreatic PLA2 with micelles of SDS by ultracentrifugation, equilibrium dialysis, microcalorimetry, fluorescence and n.m.r. spectroscopy. Ultracentrifugation and equilibrium dialysis measurements showed that on average 1.28 (+/- 0.17) PLA2 molecules and 26.4 (+/- 3.1) SDS molecules are involved in the complex and that there is a rapid equilibrium between micellar species containing one or more enzyme monomers. The estimated heat of formation of the complex, measured calorimetrically as the heat released when PLA2 was injected into excess 10 mM SDS, was 162.3 +/- 1.5) kJ/mol [38.8 (+/- 0.35) kcal/mol] of PLA2 added. The fluorescence of the single tryptophan at position 3 in the N-terminal helix of the protein increases when PLA2 binds to SDS micelles, indicating that this part of the protein is in a more hydrophobic environment in the complex. The structural changes in PLA2 on addition of [2H25]SDS were monitored using n.m.r. spectroscopy. The overall structure of the protein is unchanged, but changes in nuclear Overhauser effects (NOEs) were observed for residues in the N-terminal helix, at the active site region and in a lysine-rich region near the C-terminus. The NOE changes at the N-terminus indicate that this portion of the protein molecule adopts a more ordered, helical conformation when bound to a micelle. We suggest that these conformational changes could be the mechanism by which the enzyme becomes activated in the presence of aggregated substrate.

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9

Polikovskiy, Trofim, Vladislav Korshunov, Mikhail Metlin, Viktoria Gontcharenko, Darya Metlina, Nikolay Datskevich, Mikhail Kiskin, Yury Belousov, Alisia Tsorieva, and Ilya Taydakov. "Influence of Ligand Environment Stoichiometry on NIR-Luminescence Efficiency of Sm3+, Pr3+ and Nd3+ Ions Coordination Compounds." Molecules 28, no. 15 (August 5, 2023): 5892. http://dx.doi.org/10.3390/molecules28155892.

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Six new complexes of the ligand HQcy (-4-(cyclohexanecarbonyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one) and Ln3+ ions with emission in the near-infrared (Nd3+) or visible and near-infrared (Sm3+, Pr3+) spectral regions were synthesized and characterized using various methods, including single crystal X-ray diffraction. The study demonstrated that both tris complexes [LnQcy3(H2O)(EtOH)] and tetrakis-acids [H3O][LnQcy4] can be synthesized by varying the synthetic conditions. The photochemical properties of the complexes were investigated experimentally and theoretically using various molecular spectroscopy techniques and Judd–Ofelt theory. The objective was to quantitatively and qualitatively disclose the influence of complex stoichiometry on its luminescence properties. The study showed that the addition of an extra ligand molecule (in the tetrakis species) increased molar extinction by up to 2 times, affected the shape of photoluminescence spectra, especially of the Pr3+ complex, and increased the quantum yield of the Sm3+ complex by up to 2 times. The results obtained from this study provide insights into the luminescent properties of lanthanide coordination compounds, which are crucial for the design and development of novel photonic materials with tailored photophysical properties.

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10

Palacios, Rodrigo E., Fu-Ren F. Fan, Allen J. Bard, and Paul F. Barbara. "Single-Molecule Spectroelectrochemistry (SMS-EC)." Journal of the American Chemical Society 128, no. 28 (July 2006): 9028–29. http://dx.doi.org/10.1021/ja062848e.

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11

Saeed, Mahfouz. "Cu(InGa)(SeS)₂ Electrodeposition from a Single Bath Using Pulsing Current Technique." ECS Transactions 111, no. 2 (May 19, 2023): 3–25. http://dx.doi.org/10.1149/11102.0003ecst.

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Cu(In,Ga)(S,Se)2 (CIGSS) due to its greater band gap, has potential advantages over CuInGaSe2 (CIGS) as a photovoltaic film. Due to its lower capital cost and relatively high productivity, electrodeposition is a particularly appealing method for producing such solar materials (1-5). However, none describes the full production of such a molecule without the necessity for extra sulfur addition from the vapor phase4. Several recent articles disclose CIGSS electrodeposition. We introduce here the pulsing current method to dilute electrolytes used in previous work (6-7). Because of the diluted electrolyte composition, CIGSS can be directly electrodeposited from a single bath with a pulsing technique. The bath composition is 0.45 mM CuCl2-H2O; 0.4 mM InCl3; 0.77 mM H2SeO3; 0.51 mM GaCl3; and 0.3 mM Na2S2O3. PHydrion is applied to buffer the electrolyte to pH=2, and 0.7 M LiCl is applied as a supporting electrolyte. The flow was quantitatively characterized by agitation electrodeposition, which was done at room temperature onto a revolving disk electrode. Mass transport's impacts on deposit composition and substrate adherence are examined in various electrode rotation speeds and are represented by sample polarization curves. There was no requirement for the inclusion of metals from the gas phase during the subsequent annealing stage, which was carried out in an argon atmosphere. Two separate samples of absorber were evaluated for final sulfur atomic ratios of 5% and 15%. Utilizing the Energy-dispersive X-ray spectroscopy method, the final composition was calculated (EDS). CIGSS crystallography was analyzed using the XRD method.

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12

Mata-Miranda, Monica Maribel, Melissa Guerrero-Ruiz, Juan Ramon Gonzalez-Fuentes, Carlos Martin Hernandez-Toscano, Jesus Rafael Garcia-Andino, Miguel Sanchez-Brito, and Gustavo Jesus Vazquez-Zapien. "Characterization of the Biological Fingerprint and Identification of Associated Parameters in Stress Fractures by FTIR Spectroscopy." BioMed Research International 2019 (September 22, 2019): 1–10. http://dx.doi.org/10.1155/2019/1241452.

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Introduction. The stress fractures (SFs) are a common condition in athletes and military recruits, characterized by partial fracture caused by repetitive applications of stresses that are lower than the stress required to fracture the bone in a single loading. Fourier transform infrared (FTIR) spectroscopy gives information about the bone composition and also can determine the amount of a molecule. For this reason, the FTIR spectroscopy may be used as a tool for diagnosis of certain bone diseases related to the bone strength. In this research, we established the contributions of mineral and collagen properties to SF risk through FTIR spectroscopy, analyzing the biochemical profile differences between the healthy bone and the bone with an SF. Materials and Methods. Previous written informed consent was obtained, and samples of the hip with an SF (n = 11) and healthy bone from the femur with traumatic fracture (n = 5) were obtained and analyzed employing FTIR spectroscopy and its biochemical mapping function. Then, using FTIR spectra and the map, the collagen content and ratios corresponding to matrix maturity, mineralization, carbonate substitution, acid phosphate substitution, and crystallinity were calculated. Moreover, a histopathological analysis through Masson’s staining was conducted. Results. The biochemical analysis showed that the bone with an SF presented a bone immaturity characterized by a higher content of collagen, lower matrix maturity, mineralization, carbonate and acid phosphate substitutions, and greater crystallinity compared to the healthy bone, being checked by the ratio analysis and biochemical mapping. Besides, Masson’s stain showed a higher collagen content in the bone with an SF. Conclusions. The bone with an SF presented alterations in its biochemical composition, showing bone immaturity, which broadens the panorama of the condition to investigate future treatments or prophylactic techniques.

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13

Zuo, Jiaqi, Ning-Ning Song, Jia Wang, Xian Zhao, Meng-Yuan Cheng, Qinyi Wang, Wen Tang, Zekai Yang, and Kaipei Qiu. "Review—Single-Molecule Sensors Based on Protein Nanopores." Journal of The Electrochemical Society 168, no. 12 (December 1, 2021): 126502. http://dx.doi.org/10.1149/1945-7111/ac39da.

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The recent development of single-molecule sensors (SMS), which detect individual targets one at a time, allows determination of ultra-low concentrations of structurally similar compounds from a complex matrix. Protein nanopores are one of the earliest methods able to resolve the signal from a single molecule, and have already been successfully employed in commercial DNA sequencers. The protein nanopore based SMS, however, remains challenging, largely because the quantitative single-molecule analysis requires recording a sufficient number of signals for statistical significance within a reasonable time frame, thus restricting the lower limit of detection. This review aims to critically evaluate the strategies developed in this field over the last two decades. The measurement principle of nanopore SMS is first elucidated, followed by a systematic examination of the eight common protein pores, and a comprehensive assessment of the major types of sensing applications. A particular emphasis is placed on the intrinsic relationship between the size and charge of protein nanopores and their sensing capabilities for different kinds of analytes. Innovative approaches to lift the performance of nanopore SMS are also analyzed in detail, with a prediction at the end of the most promising future applications.

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14

Bouffiou, Jesse, Jane Ann A. Boles, and Jennifer M. Thomson. "PSXIII-20 Using 1H NMR Spectroscopy reveals metabolite markers associated to temperament and carcass quality in feedlot cattle." Journal of Animal Science 99, Supplement_3 (October 8, 2021): 438. http://dx.doi.org/10.1093/jas/skab235.784.

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Abstract The objective of this study was to identify small molecule metabolites in a serum sample taken at entry into the feedlot that can predict performance, and animal health. One-hundred and thirty-one Angus x Simmental steers from a single ranch were sampled at a commercial feedlot in Chappell, NE. Blood samples for metabolite analysis, chute score, exit velocity, and blood lactate concentration for temperament classification were collected in addition to feedlot performance data and carcass quality measurements. The GLM and LSM procedures of SAS (SAS 9.4, 2014) were used to evaluate differences between temperament classifications. Steers were divided into three exit velocity classifications one standard deviation from the mean were classified as fast and exit velocities lower than one standard deviation from the mean were slow. Forty metabolites were quantified using 1H NMR Spectroscopy from serum. Metaboloanalyst was used to analyze serum metabolites and phenotypic values using one way- ANOVA, PCA, PLS-DA, and a permutation test to cross validate. Data were normalized and scaled. No metabolites were predictive of any of the animal health metrics collected. Five metabolites were different in exit velocity class at (P < 0.01; Methanol, Isopropanol, Lactate, Isobutyrate, and Pyruvate). Similarly, seven metabolites were different in chute score classes at (P < 0.01) (Methanol, Isobutyrate, Creatinine, Dimethly Sulfone, Hippurate, Isopropanol, and Succinate). Furthermore, several metabolites in serum at entry in the feedlot were related to carcass quality metrics; Back Fat (Urea and 2-Hydroxyisobutyrate at (P < 0.01), a trend for prediction of quality grade at (P = 0.068), carcass value (P = 0.085). The relationship between serum metabolites identified on entry into the feedlot, feedlot performance traits, and eventual carcass quality warrants further research to elucidate the roles these metabolites play during the feedlot period and in predicting carcass merit.

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15

ORRIT, M., and J. BERNARD. "SINGLE MOLECULE SPECTROSCOPY." Modern Physics Letters B 05, no. 11 (May 10, 1991): 747–51. http://dx.doi.org/10.1142/s0217984991000927.

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We report unambiguous optical detection of single molecules of pentacene in p-terphenyl crystal. The relative shift of the molecular resonance frequencies with temperature changes demonstrates the phenomenon of activated spectral diffusion. These results show the feasibility of the optical study of a single molecule and its local environment.

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16

Barbara, Paul F. "Single-Molecule Spectroscopy." Accounts of Chemical Research 38, no. 7 (July 2005): 503. http://dx.doi.org/10.1021/ar050120h.

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17

Bhattacharyya, Kankan. "Single-molecule spectroscopy." Resonance 20, no. 2 (February 2015): 151–64. http://dx.doi.org/10.1007/s12045-015-0162-y.

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18

Plakhotnik, Taras, Elizabeth A. Donley, and Urs P. Wild. "SINGLE-MOLECULE SPECTROSCOPY." Annual Review of Physical Chemistry 48, no. 1 (October 1997): 181–212. http://dx.doi.org/10.1146/annurev.physchem.48.1.181.

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19

Latychevskaia, Tatiana Y. U., Kuo Kan Liang, Michitoshi Hayashi, Chung-Hung Chang, Alois Renn, Ur S. P. Wild, Jui-Hung Hsu, Ta-Chau Chang, and Sheng Hsien Lin. "Single Molecule Spectroscopy." Journal of the Chinese Chemical Society 50, no. 3B (June 2003): 477–516. http://dx.doi.org/10.1002/jccs.200300075.

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20

Dong, Jun, Zhenglong Zhang, Hairong Zheng, and Mentao Sun. "Recent Progress on Plasmon-Enhanced Fluorescence." Nanophotonics 4, no. 4 (December 30, 2015): 472–90. http://dx.doi.org/10.1515/nanoph-2015-0028.

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AbstractThe optically generated collective electron density waves on metal–dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle’s surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.

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21

LEE, Gwangrog. "Single-molecule Fluorescence Spectroscopy." Physics and High Technology 22, no. 11 (November 30, 2013): 23. http://dx.doi.org/10.3938/phit.22.051.

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22

Orrit, Michel, Taekjip Ha, and Vahid Sandoghdar. "Single-molecule optical spectroscopy." Chemical Society Reviews 43, no. 4 (2014): 973. http://dx.doi.org/10.1039/c4cs90001d.

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23

Atta, Diaa, and Ali Okasha. "Single molecule laser spectroscopy." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 135 (January 2015): 1173–79. http://dx.doi.org/10.1016/j.saa.2014.07.085.

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24

White, J. D., J. H. Hsu, C. F. Wang, Y. C. Chen, J. C. Hsiang, S. C. Su, W. Y. Sun, and W. S. Fann. "Single Molecule Fluorescence Spectroscopy." Journal of the Chinese Chemical Society 49, no. 5 (October 2002): 669–76. http://dx.doi.org/10.1002/jccs.200200101.

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25

Komatsu, Tomohiro, Kazuki Hishii, Michiko Kimura, Satoshi Amaya, Hiroaki Sakamoto, Eiichiro Takamura, Takenori Satomura, and Shin-ichiro Suye. "Highly Efficient Multi-Step Oxidation Bioanode Using Microfluidic Channels." International Journal of Molecular Sciences 22, no. 24 (December 16, 2021): 13503. http://dx.doi.org/10.3390/ijms222413503.

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With the rapid decline of fossil fuels, various types of biofuel cells (BFCs) are being developed as an alternative energy source. BFCs based on multi-enzyme cascade reactions are utilized to extract more electrons from substrates. Thus, more power density is obtained from a single molucule of substrate. In the present study, a bioanode that could extract six electrons from a single molecule of L-proline via a three-enzyme cascade reaction was developed and investigated for its possible use in BFCs. These enzymes were immobilized on the electrode to ensure highly efficient electron transfer. Then, oriented immobilization of enzymes was achieved using two types of self-assembled monolayers (SAMs). In addition, a microfluidic system was incorporated to achieve efficient electron transfer. The microfluidic system, in which the electrodes were arranged in a tooth-shaped comb, allowed for substrates to be supplied continuously to the cascade, which resulted in smooth electron transfer. Finally, we developed a high-performance bioanode which resulted in the accumulation of higher current density compared to that of a gold disc electrode (205.8 μA cm−2: approximately 187 times higher). This presents an opportunity for using the bioanode to develop high-performance BFCs in the future.

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26

JACULBIA, Rafael B., Hiroshi IMADA, Norihiko HAYAZAWA, and Yousoo KIM. "Single-Molecule Resonance Raman Spectroscopy." Vacuum and Surface Science 64, no. 1 (January 10, 2021): 34–39. http://dx.doi.org/10.1380/vss.64.34.

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Michalet, Xavier, and Shimon Weiss. "Single-molecule spectroscopy and microscopy." Comptes Rendus Physique 3, no. 5 (January 2002): 619–44. http://dx.doi.org/10.1016/s1631-0705(02)01343-9.

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28

JACULBIA, Rafael B., Hiroshi IMADA, Norihiko HAYAZAWA, and Yousoo KIM. "Single-Molecule Resonance Raman Spectroscopy." Vacuum and Surface Science 64, no. 1 (January 10, 2021): 34–39. http://dx.doi.org/10.1380/vss.64.34.

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29

Plakhotnik, Taras, and Daniel Walser. "Time Resolved Single Molecule Spectroscopy." Physical Review Letters 80, no. 18 (May 4, 1998): 4064–67. http://dx.doi.org/10.1103/physrevlett.80.4064.

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30

Patra, Digambara. "Commentary: Single-molecule fluorescence spectroscopy." Journal of Nanophotonics 6, no. 1 (March 13, 2012): 060301. http://dx.doi.org/10.1117/1.jnp.6.060301.

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31

Magee Jr., Charles W., Martin Danišík, and Terry Mernagh. "Extreme isotopologue disequilibrium in molecular SIMS species during SHRIMP geochronology." Geoscientific Instrumentation, Methods and Data Systems 6, no. 2 (December 6, 2017): 523–36. http://dx.doi.org/10.5194/gi-6-523-2017.

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Abstract. The current limitation in the accuracy and precision of inter-element analysis in secondary ion mass spectrometry (SIMS) is the ability to find measurable quantities that allow relative differences in ionization and transmission efficiency of secondary ions to be normalized. In uranium–thorium–lead geochronology, the ability to make these corrections, or "calibrate" the data, results in an accuracy limit of approximately 1 %. This study looks at the ionization of uranium and thorium oxide species, which are traditionally used in U–Pb calibration, to explore the conditions under which isotopologues, or molecular species whose composition differs only in the isotopic composition of one or more atoms in the molecule, remain in or deviate from equilibrium. Isotopologue deficits of up to 0.2 (200 ‰) below ideal mixing are observed in UO2+ species during SIMS gechronological analyses using the SHRIMP IIe SIMS instrument. These are identified by bombarding natural U-bearing minerals with an 18O2− primary beam. The large anomalies are associated with repeat analyses down a single SIMS sputtering crater (Compston et al., 1984), analysis of high-uranium, radiation-damaged zircon, and analysis of baddeleyite. Analysis of zircon under routine conditions yield UO2+ isotopologue anomalies generally within a few percent of equilibrium. The conditions under which the isotopologue anomalies are observed are also conditions in which the UOx-based corrections, or calibration, for relative U vs. Pb ionization efficiencies fail. The existence of these isotopologue anomalies suggest that failure of the various UOx species to equilibrate with each other is the reason that none of them will successfully correct the U / Pb ratio. No simple isotopologue-based correction is apparent. However, isotopologue disequilibrium appears to be a more sensitive tool for detecting high-U calibration breakdowns than Raman spectroscopy, which showed sharper peaks for ∼ 37 Ma high-uranium zircons than for reference zircons OG1 and Temora. U–Th–Sm / He ages were determined for aliquots of reference zircons OG1 (755±71 Ma) and Temora (323±43 Ma), suggesting that the broader Raman lines for the Temora reference zircons may be due to something other than accumulated radiation damage. Isotopologue abundances for UO+ and ThO+ and their energy spectra are consistent with most or all molecular species being the product of atomic recombination when the primary beam impact energy is greater than 5.7 keV. This, in addition to the large UO2+ instrumentally generated isotopologue disequilibria, suggests that any attempts to use SIMS to detect naturally occurring isotopologue deviations could be tricky.

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32

Vacha, Martin, Dharmendar Kumar Sharma, and Shuzo Hirata. "Single-molecule studies beyond optical imaging: Multi-parameter single-molecule spectroscopy." Journal of Photochemistry and Photobiology C: Photochemistry Reviews 34 (March 2018): 121–36. http://dx.doi.org/10.1016/j.jphotochemrev.2017.11.003.

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PETTINGER, Bruno, Gennaro PICARDI, Rolf SCHUSTER, and Gerhard ERTL. "Surface Enhanced Raman Spectroscopy: Towards Single Molecule Spectroscopy." Electrochemistry 68, no. 12 (December 5, 2000): 942–49. http://dx.doi.org/10.5796/electrochemistry.68.942.

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34

Chen, Ling, Liya Yang, Chunxia Wang, and Ting Zhu. "Single Molecule Force Spectroscopy of Siloxanes." IOP Conference Series: Earth and Environmental Science 714, no. 3 (March 1, 2021): 032023. http://dx.doi.org/10.1088/1755-1315/714/3/032023.

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35

LEE, Ja Yil. "Recent Advances in Single-Molecule Spectroscopy." Physics and High Technology 29, no. 4 (April 30, 2020): 11–17. http://dx.doi.org/10.3938/phit.29.012.

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36

Qiu, Yuxuan, Cuifang Kuang, Xu Liu, and Longhua Tang. "Single-Molecule Surface-Enhanced Raman Spectroscopy." Sensors 22, no. 13 (June 29, 2022): 4889. http://dx.doi.org/10.3390/s22134889.

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Single-molecule surface-enhanced Raman spectroscopy (SM-SERS) has the potential to detect single molecules in a non-invasive, label-free manner with high-throughput. SM-SERS can detect chemical information of single molecules without statistical averaging and has wide application in chemical analysis, nanoelectronics, biochemical sensing, etc. Recently, a series of unprecedented advances have been realized in science and application by SM-SERS, which has attracted the interest of various fields. In this review, we first elucidate the key concepts of SM-SERS, including enhancement factor (EF), spectral fluctuation, and experimental evidence of single-molecule events. Next, we systematically discuss advanced implementations of SM-SERS, including substrates with ultra-high EF and reproducibility, strategies to improve the probability of molecules being localized in hotspots, and nonmetallic and hybrid substrates. Then, several examples for the application of SM-SERS are proposed, including catalysis, nanoelectronics, and sensing. Finally, we summarize the challenges and future of SM-SERS. We hope this literature review will inspire the interest of researchers in more fields.

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37

Yang, Chen, Lei Zhang, Huiping Li, Yilin Guo, Chuancheng Jia, Wenguang Zhu, Fanyang Mo, and Xuefeng Guo. "Single-molecule electrical spectroscopy of organocatalysis." Matter 4, no. 9 (September 2021): 2874–85. http://dx.doi.org/10.1016/j.matt.2021.05.024.

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38

Kelley, Anne Myers, Xavier Michalet, and Shimon Weiss. "Single-Molecule Spectroscopy Comes of Age." Science 292, no. 5522 (June 2001): 1671–72. http://dx.doi.org/10.1126/science.1061767.

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39

Le Ru, Eric C., and Pablo G. Etchegoin. "Single-Molecule Surface-Enhanced Raman Spectroscopy." Annual Review of Physical Chemistry 63, no. 1 (May 5, 2012): 65–87. http://dx.doi.org/10.1146/annurev-physchem-032511-143757.

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40

Waasem, N., and T. Utikal. "Single Molecule Spectroscopy Using C-WAVE." Photonics Russia, no. 5 (2017): 52–55. http://dx.doi.org/10.22184/1993-7296.2017.65.5.52.55.

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41

Ha, T., D. S. Chemla, Th Enderle, and S. Weiss. "Single molecule spectroscopy with automated positioning." Applied Physics Letters 70, no. 6 (February 10, 1997): 782–84. http://dx.doi.org/10.1063/1.118259.

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42

Hoffmann, Toni, and Lorna Dougan. "Single molecule force spectroscopy using polyproteins." Chemical Society Reviews 41, no. 14 (2012): 4781. http://dx.doi.org/10.1039/c2cs35033e.

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43

Bel, Golan, and Frank L. H. Brown. "Theory of single molecule emission spectroscopy." Journal of Chemical Physics 142, no. 17 (May 7, 2015): 174104. http://dx.doi.org/10.1063/1.4918709.

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44

Chansin, Guillaume A. T., Rafael Mulero, Jongin Hong, Min Jun Kim, Andrew J. deMello, and Joshua B. Edel. "Single-Molecule Spectroscopy Using Nanoporous Membranes." Nano Letters 7, no. 9 (September 2007): 2901–6. http://dx.doi.org/10.1021/nl071855d.

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45

Sonntag, Matthew D., Jordan M. Klingsporn, Luis K. Garibay, John M. Roberts, Jon A. Dieringer, Tamar Seideman, Karl A. Scheidt, Lasse Jensen, George C. Schatz, and Richard P. Van Duyne. "Single-Molecule Tip-Enhanced Raman Spectroscopy." Journal of Physical Chemistry C 116, no. 1 (December 22, 2011): 478–83. http://dx.doi.org/10.1021/jp209982h.

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46

Tamarat, Ph, A. Maali, B. Lounis, and M. Orrit. "Ten Years of Single-Molecule Spectroscopy." Journal of Physical Chemistry A 104, no. 1 (January 2000): 1–16. http://dx.doi.org/10.1021/jp992505l.

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47

Barbara, Paul F., Andre J. Gesquiere, So-Jung Park, and Young Jong Lee. "Single-Molecule Spectroscopy of Conjugated Polymers." Accounts of Chemical Research 38, no. 7 (July 2005): 602–10. http://dx.doi.org/10.1021/ar040141w.

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48

Henkel, Carsten, and Vahid Sandoghdar. "Single-molecule spectroscopy near structured dielectrics." Optics Communications 158, no. 1-6 (December 1998): 250–62. http://dx.doi.org/10.1016/s0030-4018(98)00519-7.

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49

Orrit, M., and J. Bernard. "Single molecule spectroscopy in a solid." Journal of Luminescence 53, no. 1-6 (July 1992): 165–69. http://dx.doi.org/10.1016/0022-2313(92)90130-2.

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50

Blum, Christian, and Vinod Subramaniam. "Single-molecule spectroscopy of fluorescent proteins." Analytical and Bioanalytical Chemistry 393, no. 2 (October 15, 2008): 527–41. http://dx.doi.org/10.1007/s00216-008-2425-x.

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