Article
Spectroscopy
Lan Jiang, Md Mehedi Hassan, Tianhui Jiao, Huanhuan Li, Quansheng Chen
Summary: This paper utilized SERS and chemometric algorithms to quantify CP residues in rice samples, exploring different quantitative chemometric models to find the best prediction with practical applicability, achieving a limit of detection of 0.01 μg/mL. Results showed no significant difference between this method and HPLC, indicating its potential for CP detection in rice.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Spectroscopy
Dana Alina Magdas, Camelia Berghian-Grosan
Summary: The development of new approaches for honey recognition, based on spectroscopic techniques, presents a huge market potential especially because of the fast development of portable equipment. The association between Raman spectroscopy and Artificial Intelligence (i.e. Machine Learning algorithms) for food and beverages recognition starts to prove its efficiency, becoming an important candidate for the development of a practical application.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Review
Chemistry, Multidisciplinary
Sam Benson, Fabio de Moliner, William Tipping, Marc Vendrell
Summary: Recent progress in optical bioimaging has led to the demand for minimal chemical reporters that can preserve the properties and activities of biomolecules. Various approaches have been developed to reduce the size of fluorescent and Raman labels to a few atoms and incorporate them into building blocks to form native-like supramolecular structures. This integration of small optical reporters into biomolecules has enabled the creation of previously inaccessible smart molecular entities, greatly expanding their applications in biological imaging.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Applied
Hu Ge, Jin Hu, Rui Wang, Gang Zhao, Weiguang Ma, Weigen Chen, Fu Wan
Summary: This paper presents a robust approach for phase-locking, which utilizes the shape and intensity of cavity transmission profiles to identify phase deviations. The outstanding performance of this approach under severe airflow shocks demonstrates its feasibility for real-time gas detection in harsh environments.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Chemical
Anwar Ul-Hamid, Muhammad Ikram, Ali Haider, Junaid Haider, M. M. Alam, Aamer Saeed, Walid Nabgan, Iqbal Ahmad, Murad Ali, Abdulhakim Bake, Abdullah M. Asiri, Mohammed M. Rahman
Summary: The research investigated the doping of zirconium onto MoS2 nanosheets using a hydrothermal method and studied their performance in electrochemical sensor applications. A linear calibration curve was obtained for the detection of PHyd, showcasing a large dynamic range. The sensor exhibited satisfactory performance in terms of sensitivity, linearity, and detection limit.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Electrical & Electronic
Mohammad O. A. Malik, Xiaojing Ren, Chao-Mao Hsieh, Yi Zhang, Quan Liu
Summary: This study explores the use of instrumentation to accelerate the acquisition of Raman spectra. It demonstrates the equivalence between Raman Excitation Spectroscopy and conventional Raman Spectroscopy through experimental measurements. It also shows the potential of interpolating low-resolution excitation spectra to obtain higher resolution excitation spectra using excess information in Raman Excitation Maps. The development of fast tunable lasers and highly sensitive single-pixel detectors further enhances the prospects for dedicated Raman Excitation Spectroscopy instruments.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Gary Sean Cooney, David Talaga, Vicky Ury-Thiery, Yann Fichou, Yuhan Huang, Sophie Lecomte, Sebastien Bonhommeau
Summary: In this study, TERS was used to visualize the spatial distribution of adenine, protein secondary structure, and amino acids in single polyadenosine-induced tau fibrils. The findings provide insights into the incorporation of the polyadenosine cofactor in the fibril structure and its interaction with amino acids. TERS proves to be a powerful technique for studying cofactors in individual tau fibrils and their mode of interaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
Dominik Wild, Cathrin Theiss, Gerhard Holl
Summary: The identification of energetic materials in containments is a crucial challenge for safety and security. The combined laser drilling method with subsequent Raman spectroscopic measurements through microscopic bore holes offers a solution to quickly and reliably identify target substances, even when shielded by covering materials.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Review
Environmental Sciences
Cedeno Estefany, Zhenli Sun, Zijin Hong, Jingjing Du
Summary: Atmospheric aerosols have a significant impact on human health and the environment, and their characteristics like size, shape, and chemical composition influence their effects. Quantifying and identifying atmospheric aerosols is challenging due to their high variability on spatial and temporal scales. Raman Spectroscopy (RS) is a valuable technique for understanding aerosol fate and can provide insights into the chemical compositions of individual particles.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Optics
Eduardo Granados, Georgios Stoikos, Cyril Bernerd, Katerina Chrysalidis, Daniel T. Echarri, Valentin N. Fedosseev, Reinhard Heinke, Bruce A. Marsh
Summary: Tunable single-frequency lasers are important tools for studying and utilizing the electronic structure of atoms. This study demonstrates the suitability of integrated diamond Raman lasers as a high-resolution spectroscopy tool. The device can produce tunable nanosecond pulses and efficiently funnel the broad spectrum of input lasers to hard-to-access wavelength ranges.
LASER & PHOTONICS REVIEWS
(2023)
Article
Spectroscopy
Qingsheng Xue, Nan Wang, Hui Yang, Jingyao Yang, Haoxuan Bai
Summary: In this study, a method combining Spatial heterodyne technology and Raman spectroscopy was proposed for rapid, efficient, and accurate detection of microplastics. By building a spatial heterodyne spectrometer and an optical system, detection and identification of different types of microplastic samples were achieved. The results showed a higher signal-to-noise ratio with this method, indicating its good performance and potential in the field of microplastics detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Kseniya S. Shin, Shuaiqian Men, Angel Wong, Colburn Cobb-Bruno, Eleanor Y. Chen, Dan Fu
Summary: A multimodal quantitative imaging approach combining SRS, TPF, and SHG microscopy can provide useful diagnostic information for bone tissue, with the potential to separate bone cancer-associated diagnostic categories with an average accuracy of 92%.
ANALYTICAL CHEMISTRY
(2022)
Article
Instruments & Instrumentation
Maria Lucia Protopapa, Emiliano Burresi, Martino Plamisano, Emanuela Pesce, Loredana Latterini, Nicola Taurisano, Giulia Quaglia, Raffaello Mazzaro, Vittorio Morandi
Summary: The research aims to engineer desired molecular sp(2) structures in graphene oxide by controlled oxidation of graphite powder, in order to achieve tunable chemical and microstructural properties for optoelectronics or sensing applications. Experimental results show that different concentrations of potassium permanganate and potassium hydroxide can change the microstructural and chemical properties of GO, leading to significant enhancement of photoluminescence and introduction of additional electronic energy levels for tuning the functional properties of GO.
APPLIED SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Miriam C. Rodriguez Gonzalez, Alessandra Leonhardt, Hartmut Stadler, Samuel Eyley, Wim Thielemans, Stefan De Gendt, Kunal S. Mali, Steven De Feyter
Summary: This study demonstrates spatially controlled, multifunctional covalent chemical patterning of single layer graphene, with the ability to attach three different functional groups to the basal plane in dense, well-defined patterns. The method combines lithography and a self-limiting variant of diazonium chemistry, allowing for precise control over the layer thickness of the covalent films down to 1 nm. This research lays a solid foundation for the fabrication of chemically patterned multifunctional graphene interfaces for device applications.
Article
Energy & Fuels
Zepeng Wang, Zhaolong Ge, Ruihui Li, Zhe Zhou, Yudong Hou, Hui Zhang
Summary: The chemical structure of coal has a significant impact on coalbed methane mining. The study found that the functional groups of coal decrease by approximately 30% with increasing temperature. VES fracturing fluids can destroy the functional groups of coal, with high temperature and pressure weakening their destructive impact, while deionized water enhances the destruction. The coupling effect of high temperature and VES fracturing fluid makes the macromolecular structure of coal more ordered.
Article
Chemistry, Analytical
Paulina Listewnik, Mikhael Bechelany, Pawel Wierzba, Malgorzata Szczerska
Summary: This study introduced a microsphere-based fiber-optic sensor with ZnO Atomic Layer Deposition coating thicknesses of 100 nm and 200 nm for temperature measurements. The investigated sensors showed high linearity and sensitivity, with R-2 coefficients exceeding 0.99 and sensitivities of 103.5 nW/degrees C and 19 pm/degrees C or 11.4 nW/degrees C for ZnO thickness of 200 nm and 100 nm, respectively.
Article
Chemistry, Analytical
Mateusz Feldzensztajn, Pawel Wierzba, Adam Mazikowski
Summary: Cultivating medicinal herbs in controlled environments can produce high-quality products with consistent properties. A sensing system that can determine the contents of medicinal substances in plants using the spectral characteristics of leaves would be a valuable tool, but further research is needed to confirm its viability. The study in this paper focused on the influence of lighting on mint growth and found a correlation between leaf chromaticity and the spectrum of light used in cultivation.
Article
Engineering, Electrical & Electronic
Kai Wang, Shan Liu, Lanlan Wang, Janusz Smulko, He Wen
Summary: This article proposes an IpDFT-based method to estimate the frequency of a single-tone signal with step-changed parameters in a sampling signal sequence. The method utilizes multiple linear equations to handle the relationship between DFT bins and step-changed parameters, aiming to eliminate the effect of symbols.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Multidisciplinary
Janusz Smulko, Tomasz Chludzinski, Tomasz Majchrzak, Andrzej Kwiatkowski, Sebastian Borys, Aylen Lisset Jaimes-Mogollon, Cristhian Manuel Duran-Acevedo, Omar Geovanny Perez-Ortiz, Radu Ionescu
Summary: This paper presents a procedure and set-up for an electronic nose system to detect patients suffering from dengue, a mosquito-borne tropical disease, by analyzing exhaled breath. Low-power resistive gas sensors were used to detect volatile organic compounds in the breath. The experimental studies showed that the system had a detection accuracy of over 90% for dengue patients.
Article
Chemistry, Analytical
Katarzyna Drozdowska, Adil Rehman, Aleksandra Krajewska, Dmitri Lioubtchenko, Krystian Pavlov, Sergey Rumyantsev, Janusz Smulko, Grzegorz Cywinski
Summary: The sensing characteristics of carbon nanotube networks in NO2 gas environment are significantly enhanced under UV irradiation, allowing detection of lower concentrations of NO2. At low concentrations, the 1/f noise component of the carbon nanotube network is dominantly present, and the reaction speed for gas absorption-desorption is faster.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Katarzyna Drozdowska, Tesfalem Welearegay, Lars Osterlund, Janusz Smulko
Summary: The chemoresistive sensor response of nanoporous NiO films showed increased sensitivity towards NO2 under UV irradiation and elevated temperature, while irreversible decomposition was observed for acetone sensing. In situ FTIR measurements revealed the reversible surface-nitro and nitrate species formation contributing to sustained sensitivity and repeatability in NO2 sensing. Discussions were made on implications for improved and sustained NiO gas sensor properties in gas mixtures.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Multidisciplinary Sciences
Andrzej Kwiatkowski, Sebastian Borys, Katarzyna Sikorska, Katarzyna Drozdowska, Janusz M. Smulko
Summary: The COVID-19 pandemic has led to research advancements in diagnostic methods, including PCR as the gold standard. While home tests are available, there is still a need for rapid point-of-care tests for large crowds and continuous monitoring of patients. Exhaled breath analysis and electronic nose present fast detection options. This study focuses on COVID-19 detection in a local hospital using VOC gas sensors.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Katarzyna Drozdowska, Adil Rehman, Pavlo Sai, Bartlomiej Stonio, Aleksandra Krajewska, Maksym Dub, Jacek Kacperski, Grzegorz Cywinski, Maciej Haras, Sergey Rumyantsev, Lars Osterlund, Janusz Smulko, Andrzej Kwiatkowski
Summary: This study investigated the gas sensing properties of graphene back-gated field-effect transistor (GFET) sensors towards acetonitrile, tetrahydrofuran, and chloroform vapors, and unfolded possible gas detection mechanisms. Electrical measurements combined with fluctuation-enhanced sensing methodology and intermittent UV irradiation revealed distinctly different features in 1/f noise spectra for the organic gases measured under UV irradiation and in the dark. The most intense response observed for tetrahydrofuran prompted the decomposition of the DC characteristic, uncovering the photoconductive and photogating effect occurring in the graphene channel.
Review
Instruments & Instrumentation
G. Scandurra, C. Ciofi, J. Smulko, H. Wen
Summary: This article highlights the importance of Low-Frequency Noise Measurements (LFNM) in characterizing electron devices and materials, especially in the modern technological era and sensor field. However, meaningful noise measurements require highly sensitive instrumentation that is not always available. Consequently, researchers often need to design and build custom low noise instrumentation.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Physics, Applied
A. Rehman, G. Cywinski, W. Knap, J. Smulko, A. A. Balandin, S. Rumyantsev
Summary: We investigated the low-frequency electronic noise in ZrS3 van der Waals semiconductor nanoribbons. The test structures were field-effect-transistors with an off n-channel and a high on-to-off ratio. The noise in ZrS3 nanoribbons showed a 1/f(gamma) spectral density with gamma = 1.3-1.4. We used light illumination to determine that the noise is due to generation-recombination caused by deep levels, and determined the energies of the defects acting as carrier trapping centers in ZrS3 nanoribbons.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
J. Smulko, K. Drozdowska, A. Rehman, T. Welearegay, L. Osterlund, S. Rumyantsev, G. Cywinski, B. Stonio, A. Krajewska, M. Filipiak, P. Sai
Summary: We investigated the electrical properties and noise characteristics of Au nanoparticle-decorated graphene-Si Schottky barrier diodes. By introducing organic vapors or yellow light illumination, we observed shifts in the DC characteristics and differences in low-frequency noise, suggesting the potential for utilizing flicker noise for gas detection in these devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Pawel Wierzba
Summary: This paper presents a method for measuring optical path difference or phase difference using a polarimetric interferometer. The interferometer utilizes a Wollaston prism and an area detector, along with a 1280x1024 pixel camera, providing measurement ranges of approximately 780 radians at 830 nm and 1350 radians at 515 nm with high measurement resolution. The performance of the interferometer was evaluated by measuring the retardation introduced by a zero-order waveplate or a Soleil-Babinet compensator, and the resolution was estimated to be better than 0.002 rad.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Katarzyna Drozdowska, Adil Rehman, Sergey Rumyantsev, Michelle Wurch, Ludwig Bartels, Alexander Balandin, Janusz Smulko, Grzegorz Cywinski
Summary: Extending knowledge of low-dimensional van der Waals materials is crucial for developing innovative electronic and optoelectronic devices. Transition metal trichalcogenides with tunable band gaps and anisotropic conductivity show potential for gate tunability and photoreactivity, making them suitable for light-enhanced gas sensors.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Katarzyna Drozdowska, Adil Rehman, Janusz Smulko, Aleksandra Krajewska, Bartlomiej Stonio, Pavlo Sai, Aleksandra Przewloka, Maciej Filipiak, Krystian Pavlov, Grzegorz Cywinski, Dmitry V. Lyubchenko, Sergey Rumyantsev
Summary: This study investigates the noise and photoresponse characteristics of various optical transparencies of nanotube networks and identifies lower-density nanotube networks as a promising choice for UV-assisted gas sensing applications. The devices demonstrate negative photoconductivity upon exposure to UV light, and higher-transparent (lower-density) nanotube networks exhibit lower noise levels.
