Article
Spectroscopy
Juan Zhu, Jian Liu, Yao Fan, Meixia Wu, Chunsong Zhou, Haiyan Fu, Yuanbin She
Summary: This paper presents a strategy based on surface-enhanced Raman scattering (SERS) using a novel silver colloid substrate for the detection of anthraquinone dyes. The silver colloid substrates prepared by solvothermal method showed high-density hot spots with good reproducibility and high sensitivity for detecting anthraquinone dyes.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Cristina Gellini, Marina Macchiagodena, Marco Pagliai
Summary: The adsorption geometry of alizarin on silver nanoparticles was studied using density functional theory calculations, considering different charged species present in solution at different pH values. The results accurately reproduced the measured SERS spectra and elucidated the adsorption geometry of the dye on the silver substrate.
Article
Physics, Multidisciplinary
Silvia Innocenti, Marilena Ricci, Giancarlo Lanterna, Raffaella Fontana, Jana Striova, Maurizio Becucci
Summary: Identification of red lakes in painting layers by enhanced Raman spectroscopy is proposed in this study, utilizing the solubility and recrystallization of red lakes in hydrogel to isolate the lake from the painted matrix for identification purposes. This analytical method has been found effective in identifying cochineal and madder lakes, with results compared to experimental data and DFT calculations to define the organometallic complex present. The methodology is tested on aged mock-up panel paintings and historical paintings, supported by reflectance spectra and colorimetric measurements following micro-extraction.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Nanoscience & Nanotechnology
Tristan C. Paul, Guy M. Hagen, Anatoliy O. Pinchuk, Kelly L. McNear
Summary: Creating sensitive and reproducible SERS substrates is a challenge. This study found that using a 405 nm laser to deposit lines of silver nanoparticles from a silver nitrate and sodium citrate solution yielded the best enhancement and consistency.
Article
Biochemistry & Molecular Biology
Pascal Rauthe, Kristina Sabljo, Maike Kristin Vogelbacher, Claus Feldmann, Andreas-Neil Unterreiner
Summary: This study compares the characteristics of water-soluble dye alizarin red S (ARS) nanoparticles, ARS in aqueous solution, and alizarin in DMSO using femtosecond technology. The results show slight differences in the stationary absorption spectra between nanoparticles and solution. Excitation at 530 nm leads to weak and noisy responses, and transient spectra of the nanoparticles at 267 nm were recorded. The [La(OH)(2)][ARS] nanoparticles in aqueous solution exhibit a fast relaxation process of 14 ps after excitation at 530 nm, similar to Na(ARS) solution (19 ps).
Article
Nanoscience & Nanotechnology
Chengpeng Zhang, Shuai Chen, Zhaoliang Jiang, Zhenyu Shi, Jilai Wang, Lutao Du
Summary: A highly sensitive and stable 3D SERS substrate based on ordered micropyramid array and silver nanoparticles was constructed, showing a low detection limit and high repeatability. The substrate also demonstrated the ability to quantitatively analyze pesticide residues.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Spectroscopy
Hulya Yilmaz, Shyam S. Mohapatra, Mustafa Culha
Summary: The study compared SERS and SEIRAS for microbial identification, showing that SEIRAS provides rich molecular information and improved discrimination power compared to FTIR, making it a potential technique for microbial analysis.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biophysics
Qiuyan Chen, Liyan Zhao, Hong Liu, Qianqian Ding, Chenghao Jia, Sihao Liao, Ningtao Cheng, Min Yue, Shikuan Yang
Summary: In this study, nanoporous Ag nanorods were prepared through chemical reduction of electrodeposited Ag7O8NO3 nanorods using a reducing agent. The nanopores in the Ag nanorods can function as both analyte containers and SERS hot spots, providing strong SERS enhancement. The simple fabrication process and outstanding SERS performance make the nanoporous Ag nanorods promising candidates for sensitive detection of various pollutants, narcotics, and biomolecules.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Physics, Multidisciplinary
S. Innocenti, M. Ricci, D. Quintero Balbas, R. Fontana, J. Striova, M. Becucci
Summary: This study characterized the components of the red dye madder lake using XRD, IR, and UV-Visible spectroscopies, and extracted the dye from painting mock-ups using hydrated and ethanol-rich agar gel beads. The aim of the research was to show the advantages and limitations of Raman spectroscopy and Surface-Enhanced Raman Spectroscopy (SERS) for identifying madder lake constituents in hydrogels used for sample micro-extraction. The main advantage of SERS for madder lake detection is the ability to acquire spectra in random spots in the gel bead without the need for recrystallized grain localization in the dried hydrogel.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Nanoscience & Nanotechnology
Chen Feng, Xiaodong Wang, Jinzhong Yang, Shuang Xi, Mengyu Jia, Jun Shen
Summary: This study demonstrates the use of chitosan aerogel decorated with Ag nanoparticles as a SERS substrate with high sensitivity and reproducibility. The proposed technique has potential applications in various fields.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Medicinal
Adrian Leon-Valencia, Sarah Briceno, Carlos Reinoso, Karla Vizuete, Alexis Debut, Manuel Caetano, Gema Gonzalez
Summary: The photochemical reduction method was used to optimize the deposition of silver nanoparticles on the diatom surface for DNA biosensing. The nanocomposites were characterized using various techniques and a significant enhancement in fluorescence response was observed at 440 nm excitation wavelength. This work demonstrates a low-cost and green alternative fabrication method for fluorescent biosensors by depositing plasmonic nanoparticles on diatoms.
Article
Biochemistry & Molecular Biology
Viviana Mollica Nardo, Vincenzo Renda, Sebastiano Trusso, Rosina Celeste Ponterio
Summary: This paper details the fabrication, characterization, and testing of SERS-active substrates specifically designed for detecting pigments in artwork. The substrates were found to effectively amplify Raman scattering of various dyes and were stable in the pH range between 3 and 11. Additionally, vibrational DFT calculations provided a complete description of the observed SERS spectra.
Article
Chemistry, Multidisciplinary
Junfang Li, Yanfang Xu, Lulu Tian, Yibo Yan, Liyong Niu, Xiaohong Li, Zhijun Zhang
Summary: Poly(vinylpyrrolidone) was employed as a modifier and reductant to deposit silver nanoparticles on silica nanospheres, creating SiO2@Ag, which can assemble into SiO2@Ag arrays. These substrates exhibit strong Raman enhancement capabilities and high detection sensitivity for trace organic pollutants like rhodamine 6G.
Article
Nanoscience & Nanotechnology
Zi-Han Hsu, Li Hsu, Chia-Chi Huang
Summary: This report introduces a method for preparing polyacrylamide materials with unique surface morphology. By cross-linking and reduction reactions, the smooth polymer surface is transformed into submicron cubic clusters impregnated with silver nanoparticles. The resulting material resembles the Great Barrier Reefs in overall morphology and features a high content of active silver nanostructures. It demonstrates versatility in surface-enhanced Raman scattering and methanolysis catalysis. These methods enlarge the surface area of the shape-adapting polymer material while generating minimal chemical waste.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
AbdElAziz A. Nayl, Ahmed Abd-Elhamid, Ismail M. Ahmed, Stefan Braese
Summary: In this study, the adsorption of Cr(VI) ions and the organic dye Alizarin Red S (ARS) was investigated using magnetite talc (Fe3O4@Talc) nanocomposite. Different characterization techniques were employed to analyze the physical and chemical properties of the fabricated Fe3O4@Talc nanocomposite. The adsorption isothermic, kinetic, and thermodynamic properties were illustrated. The results showed that Fe3O4@Talc nanocomposite is a promising and stable adsorbent with good adsorption capacity and reusability potential.
Article
Chemistry, Multidisciplinary
Juliana S. Souza, Fernando T. H. Hirata, Paola Corio
JOURNAL OF NANOPARTICLE RESEARCH
(2019)
Article
Chemistry, Physical
Patricia B. Santos, Jonnatan J. Santos, Charlane C. Correa, Paola Corio, Gustavo F. S. Andrade
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2019)
Article
Biochemical Research Methods
Raisa L. Silveira, Monica B. Mamian-Lopez, Joel C. Rubim, Marcia L. A. Temperini, Paola Corio, Jonnatan J. Santos
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Physical
Paola Corio, Karina C. Silva, Natalia A. Soares, Fabiana Inoue, Jonnatan J. Santos
CHEMICAL PHYSICS LETTERS
(2019)
Article
Chemistry, Inorganic & Nuclear
Jonnatan J. Santos, Sergio H. Toma, Natalia M. Monezi, Romulo A. Ando, Paola Corio, Koiti Araki
INORGANIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Barbara Scola Rodrigues, Carolyne Martins Branco, Paola Corio, Juliana S. Souza
CRYSTAL GROWTH & DESIGN
(2020)
Article
Chemistry, Analytical
Leonardo H. Paulucci, Tamiris de Almeida, Eliel E. Farias, Paola Corio, Ladario da Silva, Michele L. de Souza
VIBRATIONAL SPECTROSCOPY
(2020)
Article
Chemistry, Physical
Jonnatan J. Santos, Sergio H. Toma, Romulo A. Ando, Paola Corio, Koiti Araki
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Michele Lemos de Souza, Juan Carlos Otero, Isabel Lopez-Tocon
Article
Chemistry, Analytical
Michele Lemos De Souza, Samuel Valdivia, Juan Carlos Otero, Isabel Lopez-Tocon
Summary: Surface-Enhanced Raman Spectroscopy (SERS) was used to detect Bisphenol A (BPA), an endocrine disruptor commonly found in plastic products. Silver nanoparticles (AgNPs) synthesized using different reducing agents were tested, and Ag@Cit NPs were identified as the best SERS substrate. The lowest limit of quantification for BPA was 0.01 mM (2.3 μg/mL) using Ag@Cit NPs, with enhanced bands observed at 350 cm(-1) and 460 cm(-1). Electrochemical spectra and TD-DFT calculations provided insights into the SERS signal mechanism and confirmed a surface plasmon-like resonance within the silver cluster.
Article
Chemistry, Multidisciplinary
Suzimara Rovani, Jonnatan J. Santos, Sabine N. Guilhen, Paola Corio, Denise A. Fungaro
Article
Chemistry, Multidisciplinary
Michele Lemos de Souza, Paola Corio
Meeting Abstract
Chemistry, Multidisciplinary
Jonnatan Santos, Raisa Silveira, Sergio Toma, Koiti Araki, Alexandre Brolo, Paola Corio
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
Suzimara Rovani, Jonnatan J. Santos, Paola Corio, Denise A. Fungaro
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Analytical
Elena Naumovska, Gabriel Kofi Nzulu, Laura Mazzei, Arnaud Le Febvrier, Kristina Komander, Martin Magnuson, Max Wolff, Per Eklund, Maths Karlsson
Summary: Results from an infrared spectroscopy study on hydrated nanocrystalline films of BaZr1-xScxO3-x/2 with different Sc concentrations show variations in the O-H stretching bands, indicating different proton configurations. Higher Sc concentrations exhibit a distinct O-H stretching band, while lower Sc concentrations show a broader, weaker band.
VIBRATIONAL SPECTROSCOPY
(2024)
