Article
Chemistry, Multidisciplinary
Marjan Ghasemi, Hayoung Jeong, Donggyu Kim, Byungjoo Kim, Joon Ik Jang, Kyunghwan Oh
Summary: In this study, transfer ribonucleic acid (tRNA) thin solid films (TSFs) were successfully obtained using an optimized deposition process with an aqueous solution precursor. The uniform solid layers of tRNA with a thickness of 30 to 46 nm were consistently fabricated by adjusting the RNA concentration and deposition process parameters. The experiments showed that the tRNA TSFs had high transparency for lambda > 350 nm in a wide spectral range covering UV-VIS-NIR. Linear correlation between the refractive index and tRNA concentration in the aqueous solution was observed for tRNA TSFs on silicon substrates. The tRNA TSFs also exhibited high potential as an efficient nonlinear optical material in the IR spectral range.
Article
Optics
Ana-Maria Manea-Saghin, Cosmina Andreea Marin, Carla-Cezarina Paduretu, Francois Kajzar
Summary: In this study, the water insoluble DNA functionalized with CTMA surfactant was used as a matrix to investigate the linear and nonlinear optical properties of two aromatic compounds. The results showed that these materials have potential applications in photonics.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Reza Khazaeinezhad, Sahar Hosseinzadeh Kassani, Marjan Ghasemi, Yongjae Cho, Seong Il Im, Dong Il Yeom, Fabian Rotermund, James G. Grote, Emmanuelle Deleporte, Isabelle Ledoux-Rak, Kyunghwan Oh
Summary: This research reveals the nonlinear optical properties of the fundamental constituents of DNA and RNA, nucleobases, in solid thin films and demonstrates their application in generating ultrashort laser pulses. The findings provide a new avenue for photometry measurement.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Yang Li, Guanqing Zhang, Yutao Tang, Xuecai Zhang, Wenfeng Cai, Yanjun Liu, Tun Cao, Guixin Li
Summary: A metal-silicon hybrid metasurface is proposed to generate strong third harmonic signals from an amorphous silicon film. By integrating the film into a gold plasmonic nanocavity and controlling the periods of the gold meta-atoms, the efficiency of the third harmonic generation process is greatly enhanced and provides new routes for developing silicon photonic devices with high optical nonlinearity.
Article
Optics
Jorge H. Soares, Lais Fujii Dos Santos, Felipe G. S. Santos, Marvyn Inga, Yovanny A. V. Espinel, Gustavo S. Wiederhecker, Thiago P. Mayer Alegre
Summary: This study demonstrates third-harmonic generation using a small wedge silicon oxide optical microcavity. The dispersion of the microdisks can be tailored to normal or anomalous group velocity dispersion, and the authors operated in the normal dispersion regime to prevent frequency comb generation. The tunability of the third-harmonic emission was achieved through thermo-optical and Kerr effects, and the agreement between this process and couple-mode theory was demonstrated.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Bethany Searle, Markus Mueller, Thomas Carell, Andrew Kellett
Summary: The discovery of epigenetic bases has greatly impacted our understanding of disease and development. One of the most studied epigenetic marks is the modification of cytosines at the 5 position. Determining the spatiotemporal distribution of these modifications within the genome is crucial for gaining insight into their biological significance. While third-generation sequencing platforms have the potential to directly detect epigenetic modifications, chemical or enzymatic derivatisation currently provides the most reliable method. This Review discusses techniques available for the detection of cytosine modifications on third-generation platforms.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Optics
Jeetendra Gour, Sebastian Beer, Alessandro Alberucci, Uwe D. Zeitner, Sstefan Nolte
Summary: We experimentally investigate third harmonic generation from plasmonic metasurfaces composed of centrosymmetric gold nanobars arranged in two-dimensional rectangular lattices. We demonstrate that surface lattice resonances (SLRs) at the relevant wavelengths play a significant role in determining the magnitude of the nonlinear effects by varying the incidence angle and lattice period. Moreover, exciting multiple SLRs simultaneously leads to an additional enhancement in third harmonic generation, which results in interesting phenomena such as maximum enhancement for counter-propagating surface waves along the metasurface and cascading effect simulating a third-order nonlinearity.
Article
Materials Science, Multidisciplinary
Chao Liu, Puxin Cheng, Rongchao Shi, Fei Ge, Xiao Han, Siming Qi, Geng Li, Jialiang Xu
Summary: This study reports the observation of optical second harmonic from a fully conjugated fluorescent 2D material, tetraphenylethylene-graphdiyne (TPE-GDY), based on sp and sp(2) hybridized carbon atoms. The stability of TPE-GDY is improved by mixing it with polyvinylpyrrolidone (PVP) to prepare TPE-GDY/PVP nanocomposite films. Cotton effect and favorable SHG response have been observed from these composite films, enriching the material system in the field of NLO effects.
Article
Optics
Ravi P. N. Tripathi, Xiaodong Yang, Jie Gao
Summary: This study reports the anisotropic third-harmonic generation (THG) response of mechanically exfoliated As2S3 thin flakes. The polarization-dependent evolution of THG emission from butterfly-shaped pattern to four-lobe pattern is comprehensively explored. The third-order nonlinear susceptibility of As2S3 crystal is extracted by analyzing the thickness-dependent THG emission.
Article
Optics
Vyacheslav A. Trofimov, Dmitry M. Kharitonov, Mikhail Fedotov
Summary: This paper proposes a new scheme for fifth harmonic generation based on cascading third harmonic generation, which can improve frequency up-conversion efficiency. The feasibility of this scheme is theoretically demonstrated using multi-scale approach and can be applied directly to femtosecond pulses in a medium with cubic nonlinear response.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Zahra Razavi, Hassan Pakarzadeh
Summary: Optical nanoantennas have gained significant research interest for their ability to concentrate far-field radiation into sub-wavelength dimensions. They have also been utilized to enhance the functionality of nonlinear optical devices. By properly designing nanoantennas, changing the geometry, and inserting nanocrystals, the efficiency of third-harmonic generation emission can be significantly improved.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
Yang Li, Xuecai Zhang, Yutao Tang, Wenfeng Cai, Kuan Liu, Ningbin Mao, Kingfai Li, Junhong Deng, Yanjun Liu, Tun Cao, Guixin Li
Summary: Research shows that incorporating alpha-GST into nanocavity metasurface can greatly enhance third harmonic generation, and provide a powerful platform for characterizing the third-order nonlinear susceptibility of the active medium in the cavity.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Jyothsna Konkada Manattayil, Lal A. S. Krishna, Rabindra Biswas, Hyunmin Kim, Varun Raghunathan
Summary: In this study, we demonstrate sub-diffraction imaging in an infrared-sensitive third-order sum frequency generation microscope using the focal-field engineering technique. The presence of a phase mask leads to a reduction in the size of the TSFG central lobe and an improvement in contrast for periodic grating structures. Additionally, the infrared sensitivity of the focus-engineered TSFG microscope is validated through imaging of amorphous Germanium-based structures and polystyrene latex beads. The focus-engineered TSFG process shows promise as an imaging modality with infrared selectivity, improved resolution, and contrast, making it suitable for nanostructure and surface layer imaging.
Article
Chemistry, Physical
Payal Bhattacharya, Maria Morrell, Yangchuan Xing, Cherian J. Mathai, Ping Yu, Suchismita Guha
Summary: Lead halide perovskites exhibit interesting nonlinear optical properties, allowing for third and higher-order harmonic generation. By comparing CsPbBr3 nanocrystals to RP-CsPbBr3 nanocrystals with planar defects, it was found that the RP-CsPbBr3 has a higher efficiency in third harmonic generation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Aleksandra Radko, Jacek Niziol, Katarzyna Makyla-Juzak, Robert Ekiert, Natalia Gorska, Andrzej Gorecki, Monika Marzec
Summary: This study utilized DNA-CTMA complexes to prepare surface films, finding that only the monolayer of plasmid DNA-CTMA complex remained continuous after being transferred onto a solid substrate, while other complexes underwent spontaneous self-assembling.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Marco P. Rodrigues, Camila M. Cholant, Luana U. Krueger, Lourenzo M. Rodrigues, Javier A. Gomez, Joao F. Prolo Filho, Wladimir H. Flores, Andre Guendel, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study investigates the physical and electrochemical properties of WO3 thin films and their electrochromic mechanism using experiments and a mathematical model. The results show high performance in electrochromic efficiency, optical modulation, charge density, and reversibility of color change. The relationship between electrochromic and electrochemical reactions is confirmed by analyzing the data from various characterization techniques.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Rafaela M. J. Lemos, Raphael D. C. Balboni, Camila M. Cholant, Cristiane F. Azevedo, Agnieszka Pawlicka, Andre Gundel, Wladimir H. Flores, Cesar O. Avellaneda
Summary: Doping with molybdenum improved the cycling stability and reversibility of Niobium pentoxide thin films, resulting in increased charge density, ionic conductivity, and reversibility after 50 cycles. The X-ray diffraction analysis showed a mixture of crystalline phases in the doped films, indicating enhanced performance for potential use in electrochromic devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Polymer Science
Nadiyah Rashed Al Atmah, Willian R. Caliman, Agnieszka Pawlicka, Ribal Georges Sabat, Jean-Michel Nunzi
Summary: In this study, homogeneous thin films of chitosan-PADA dye were deposited on glass substrates using spin-coating method. ATR-FTIR spectroscopy and UV-VIS spectroscopy were performed to characterize the films, revealing hydrogen bonding and the formation of surface relief grating (SRG). AFM confirmed the existence of SRG and measured the grating depth.
Article
Polymer Science
Rodrigo C. Sabadini, Mariana Fernandes, Veronica de Zea Bermudez, Agnieszka Pawlicka, Maria M. Silva
Summary: The increase in agricultural product demand has complicated the modernization of agriculture. Research advances have improved production systems, but their unsustainable application is a challenge. Hydrogels, as attractive materials, offer potential solutions to this problem in agriculture.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Lada Puntus, Konstantin Lyssenko, Ilya V. Taidakov, Francois Kajzar, Ileana Rau
Summary: The effects of molecules of substituted [2,2]paracyclophane on the field corona poling experiment of thin film of polymethyl methacrylate (PMMA) polymer were investigated. The mutual orientation of different substituents was found to impact the second order non-linear optical susceptibility. The phenyl substituted molecule exhibited the highest susceptibility value of 72.2 +/- 7.2 pm/V at a fundamental wavelength of 1064.2 nm. X-ray structure, absorption spectroscopy, and quantum chemical calculations were employed to discuss the obtained values.
Article
Polymer Science
Cristiana Luminita Gijiu, Raluca Isopescu, Daniel Dinculescu, Maria Memecica, Manuela-Rossemary Apetroaei, Mirela Anton, Verginica Schroder, Ileana Rau
Summary: This study experimentally investigated and optimized the extraction of chitin from crab shells to obtain chitosan with a predefined deacetylation degree and molecular mass. By varying four parameters, including NaOH concentration, temperature, HCl concentration, and number of acidic treatments, the optimum operating conditions were determined. The results showed that a high deacetylation degree of chitosan can be achieved with 5% NaOH concentration and low temperatures, while high molecular mass chitosan can be obtained with a single step acidic treatment.
Article
Biochemistry & Molecular Biology
Willian Robert Caliman, Franciani Cassia Sentanin, Rodrigo Cesar Sabadini, Jose Pedro Donoso, Claudio Jose Magon, Agnieszka Pawlicka
Summary: Nanocomposite polymer electrolytes (NPEs) are prepared using gellan gum (GG) and montmorillonite (Na+SYN-1) clay. These NPEs show high conductivity, good thermal stability, and optical transparency. The coordination environment of Cu2+ ions in the samples is identified using CW-EPR.
Article
Chemistry, Physical
Daniel Dinculescu, Cristiana Luminit Gijiu, Manuela Rossemary Apetroaei, Raluca Isopescu, Ileana Rau, Verginica Schroder
Summary: This study focuses on utilizing waste egg capsules of Rapana venosa as raw material to extract chitosan oligomers, with the aim of optimizing the extraction process. By using experimental design and neural modeling, a maximum yield of 7.05% was achieved with a NaOH concentration of 6.47%, temperature of 90 degrees C, and extraction duration of 120 min.
Article
Materials Science, Multidisciplinary
Willian R. Caliman, Franciani C. Sentanin, Rodrigo C. Sabadini, Rodrigo H. S. Garcia, Tatiana Monaretto, Luiz A. Colnago, Agnieszka Pawlicka
Summary: This paper investigates nanocomposite polymer electrolytes (SPEs) consisting of montmorillonite (MMT; Na+SYN-1) and gellan gum. The characteristics of the membrane samples were analyzed using ATR-FTIR, TD-NMR, and SEM. The results showed an interaction between gellan gum and Na+SYN-1, as well as a more homogeneous surface in the nanocomposite with 40 wt.% Na+SYN-1. The application of NPEs in small electrochromic devices (ECDs) exhibited a decrease in peaks and charge density.
Article
Polymer Science
Katherine Pacheco, Gabriela Aldea-Nunzi, Agnieszka Pawlicka, Jean-Michel Nunzi
Summary: Curcumin, a natural dye found in turmeric, can be used as a photosensitizer in acrylamide-based photopolymers for holographic data storage. Increasing the concentration of curcumin enhances the absorbance, refractive index contrast, sensitivity, and diffraction efficiency of the photopolymer films. Furthermore, the addition of NaOH promotes the efficiency of photopolymerization in the AA-curcumin-based sample.
Article
Chemistry, Physical
Nicolaie Marin, Cristina Orbeci, Liliana Bobirica, Ileana Rau, Calin Deleanu, Elena Iuliana Biru, Paul Octavian Stanescu, Andrei Constantin Berbecaru, Ecaterina Matei, Constantin Bobirica
Summary: Solid activators based on waste glass were synthesized for the manufacture of one-part alkali-activated fly ash/red mud materials. The results showed that the reaction temperature significantly influenced the properties of the solid activators. The best water solubility and compressive strength were achieved for the solid activators synthesized at a temperature of 600 degrees Celsius.
Article
Polymer Science
Adrian Petris, Petronela Gheorghe, Ileana Rau
Summary: This study investigates the influence of DNA-CTMA matrix on the emission of Rhodamine 610 in thin films under 532nm laser illumination at different concentrations.
Article
Multidisciplinary Sciences
Adrian Petris, Petronela Gheorghe, Ileana Rau
Summary: This study reports on the influence of continuous wave laser light at 532 nm on the transmittance and photoluminescence of DNA-CTMA-RhB in butanol compound. The experimental investigation and analysis show the effect of DNA-CTMA on the light-induced process, as well as the temporal dependence of absorption changes induced by the laser light.
Article
Chemistry, Multidisciplinary
Alice Gianina Simonca, Madalina Georgiana Albu Kaya, Ileana Rau, Maria Minodora Marin, Cristina-elena Dinu-pirvu, Alina Lupuliasa, Mihaela Violeta Ghica
Summary: The purpose of this study was to obtain and characterize collagen-based hydrogels with different concentrations of metronidazole and strontium ranelate for periodontal therapy. The structural integrity of the hydrogels was evaluated using circular dichroism, and the release of metronidazole was investigated using an immersion cell adapted to USP 2 apparatus. The results showed that the collagen hydrogels with metronidazole preserved the integrity of the collagen triple helix, while the presence of strontium ranelate caused a structural alteration. The designed collagen-based hydrogels with metronidazole could be beneficial for periodontal disease treatment.
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE
(2023)
Proceedings Paper
Health Care Sciences & Services
Verginica Schroder, Manuela Rossemary Apetroaei, Mirela Adina Anton, Irina Mihaela Iancu, Ileana Rau
Summary: The study evaluated the accumulation and storage of manganese ions in four common species from Romanian waters, with two species from sandy habitats found to accumulate significant amounts of manganese.
2021 INTERNATIONAL CONFERENCE ON E-HEALTH AND BIOENGINEERING (EHB 2021), 9TH EDITION
(2021)
