Article
Chemistry, Multidisciplinary
Yu Liang, Wanrui Gui, Zhihong Yang, Kang Cheng, Xin Zhou, Can Yang, Jianmei Xu, Wei Zhou
Summary: Designing organic-inorganic hybrid semiconductors is an effective strategy for improving photocatalyst performance. In this experiment, Cu was introduced into perylenediimide supramolecules (PDIsm) to prepare one-dimensional Cu-dopped PDIsm (CuPDIsm), which was then combined with TiO2 to enhance photocatalytic performance. The integration of Cu in PDIsm increases visible light absorption and specific surface areas, leading to accelerated electron transfer. The migration of photo-induced electrons from CuPDIsm to TiO2 nanoparticles further enhances electron transfer and charge carrier separation, resulting in excellent photodegradation activity under visible light irradiation.
Article
Chemistry, Applied
Lizhu Zhao, Guobao Li, Fang Li, Mingming Yao
Summary: The YFAg-TS composite nanocrystalline film prepared by the modified sol-gel method exhibited prominent photocatalytic performance. Characterization results revealed the structure and properties of the YFAg-TS film and confirmed its superior photocatalytic performance compared to pure TiO2 film.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Olivier Henrotte, Stepan Kment, Alberto Naldoni
Summary: The impact of surface defects on the photoactivity of plasmonic hybrid nanostructures was investigated using scanning photoelectrochemical microscopy (SPECM). It was found that mild reduction treatment significantly enhances the photoactivity of TiO2 ultrathin films under visible light. Plasmonic photoactivity mapping using Au nanoparticle arrays deposited on different reduced TiO2 films revealed the effect of interfacial defects on hot charge carriers and the role of electron leakage.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Dalanda Hamdi, Lobna Mansouri, Varsha Srivastava, Mika Sillanpaa, Latifa Bousselmi
Summary: The addition of Eu to TiO2 photocatalysts showed the best enhancement in photoactivity performance for the removal of AB dye compared to Ce-TiO2 and pure TiO2 films. The optimal concentration for better electron/hole separation was found to be 1 wt% Ce or 0.1 wt% Eu doping in TiO2. EIS measurements demonstrated that Ce-TiO2(1 wt%) and Eu-TiO2(0.1 wt%) photocatalysts had lower electron transfer resistance than pure TiO2, leading to more effective separation of electron/hole pairs during photodegradation reactions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Fan Fu, Yufan Zhang, Yan Zhang, Yuyue Chen
Summary: In this experiment, Mn@TiO2 nanofibers were fabricated and their enhanced photocatalytic activity with added manganese ion was observed. The degradation efficiency under ultraviolet light significantly increased and potential applications in capacitors were explored.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Araceli de Aquino, Francisco J. Caparros, Khai-Nghi Truong, Kari Rissanen, Montserrat Ferrer, Yongsik Jung, Hyeonho Choi, Joao Carlos Lima, Laura Rodriguez
Summary: The synthesis of four novel gold(I)-phosphane complexes coordinated to 9-phenanthrene chromophore was successfully achieved. The X-ray crystal structures of the compounds revealed different intermolecular assemblies and aurophilic interactions. Photophysical characterization showed distinct emission properties in solid films compared to solution samples.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Monika Monica, Reena Reena, Sukhjeet Singh, Suhaas Gupta, Stuti Tomar, Ravi Kant Choubey, S. Gaurav, Tejendra K. Gupta, Dimple Kumari, Sunil Kumar
Summary: In this study, time-resolved photoluminescent emission decay curves were simulated for different nanophosphors and their dependence on various parameters was investigated. The results show that the excited state lifetime is affected by factors such as dopant concentration and nanocomposite composition.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Sarvin Mohammadi-Aghdam, Zirar M. Mizwari, Hossein Khojasteh
Summary: The highly efficient Cu doped TiO2/Yb2O3 (CTYO) photoactive nanocomposite was prepared using a simple and straight sol-gel method. The structural, morphological, and other properties of the prepared nanocomposite were studied. X-ray diffraction analysis confirmed the existence of both Yb2O3 and TiO2 phases in the crystalline structure of CTYO. UV-Vis diffuse reflectance spectroscopy showed that the prepared samples have great potential as efficient visible light photocatalysts. The photoactivity of the samples was evaluated through the degradation of acid red 88 solution (AR88) under visible light irradiation. The CTYO photocatalyst degraded 92.5% of AR88 in solution after 180 minutes of illumination. The degradation efficiency was studied under different pH values of AR88 solution and amounts of loaded photocatalyst. The stability and recyclability of the prepared photocatalyst were also investigated, demonstrating the superiority of CTYO as a visible light photocatalyst.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jie She, Wei Pei, Si Zhou, Jijun Zhao
Summary: This study explores the structural and electronic factors that govern the luminescent properties of ligand-protected metal clusters. By using time-dependent density functional theory calculations, the researchers found that the emission wavelength and fluorescence intensity of a particular gold cluster could be adjusted by substituting the central gold atom with different transition metal atoms. The study also reveals the crucial role of dopants, the gold cage, and ligands in the development of light-emitting behavior.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Ziwang Zhou, Rong Yang, Yixiang Teng, Yafeng Li, Mingdeng Wei
Summary: A composite of F-doped TiO2(B) and reduced graphene oxide (F-TiO2(B)/rGO) was successfully synthesized via a one-step hydrothermal route. The introduction of F ions in the synthetic process led to the uniform dispersion of TiO2(B) on rGO nanosheets and improved the conductivity of the materials. The composite exhibited a large capacity of 249.4 mA h g(-1) at 0.2 A/g and a capacity retention of 96% after 500 cycles at a high current density of 2 A/g.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
T. Jeyakumaran, N. Venkatesh Bharathi, P. Sriramachandran, R. Shanmugavel, S. Ramaswamy
Summary: A series of white light emitting phosphors were successfully synthesized with high CRI and excellent CCT through doping concentration optimization. These phosphors show potential applications in WLEDs excited with near-UV.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Deep Kumar Das, Rangarajan Bakthavatsalam, Venkatesha R. R. Hathwar, Raghavaiah Pallepogu, Janardan Kundu
Summary: Broadband emission in zero-dimensional metal halide hybrids (Sb3+, In3+, Cd2+, and Bi3+) originates from self-trapping of excitons within the metal-halide units. The emission profile can be regulated by introducing ns(2) ion-based dopants. This study reports the synthesis of doped Cd and In based metal halide hybrids that show enhanced and efficient broadband emission, which is attributed to the dopant extrinsic self-trapping emission.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Chemical
Md Noor Arifin, Mostafa Tarek, Md Maksudur Rahman Khan
Summary: In this study, boron-doped TiO2 (B@TiO2) photocatalysts were synthesized using a sol-gel method, and the results showed that the catalysts exhibited enhanced visible light absorption and photocatalytic activity. Through the optimization of catalyst synthesis, the highest degradation rate of 93% was achieved for the model dye.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Shamsa Munir, Faiza Asghar, Faryal Younis, Saira Tabassum, Afzal Shah, Sher Bahadar Khan
Summary: Nanoparticles can be modified with dopants to exhibit antibacterial, antifungal, and antioxidant activities. The doped TiO2 nanoparticles showed improved performance against certain microorganisms, while Ni-TiO2 nanoparticles demonstrated the highest antioxidant capacity.
Article
Environmental Sciences
Tehmina Akhtar, Habib Nasir, Effat Sitara, Syeda Aqsa Batool Bukhari, Sharif Ullah, Rana Muhammad Arslan Iqbal
Summary: Cu-doped TiO2 photocatalyst was prepared by sol-gel method and characterized by various techniques. The catalyst demonstrated efficient degradation of NB under visible light and showed good stability for reusability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Biochemistry & Molecular Biology
Gianmaria Calisesi, Alberto Ghezzi, Daniele Ancora, Cosimo D'Andrea, Gianluca Valentini, Andrea Farina, Andrea Bassi
Summary: Compressed sensing is a signal processing approach that solves ill-posed inverse problems by exploiting sparsity constraints and prior information. It has various applications in image compression, scientific and medical fields, as well as fluorescence microscopy.
PROGRESS IN BIOPHYSICS & MOLECULAR BIOLOGY
(2022)
Article
Parasitology
Lars ten Bosch, Birgit Habedank, Alessia Candeo, Andrea Bassi, Gianluca Valentini, Christoph Gerhard
Summary: This study used light sheet fluorescence microscopy (LSFM) to investigate the anatomy of blood-sucking arthropods in vivo, specifically focusing on the human louse. The results demonstrated that fluorescence staining coupled with LSFM is a powerful and straightforward method for studying the morphology, including anatomy, of blood-sucking lice and other arthropods.
PARASITES & VECTORS
(2022)
Article
Anatomy & Morphology
Elena Corbetta, Alessia Candeo, Andrea Bassi, Daniele Ancora
Summary: This study proposes a new reconstruction method based on autocorrelation inversion, which allows for highly resolved reconstructions of multi-view images without the need for alignment procedures.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Physics, Multidisciplinary
Alessia Candeo, Benedetto Ardini, Marta Ghirardello, Gianluca Valentini, Laurence Clivet, Charlotte Maury, Thomas Calligaro, Cristian Manzoni, Daniela Comelli
Summary: Scientific investigation in the cultural heritage field has been focused on characterizing constituent materials and the conservation status of artworks. Reflectance spectral imaging and hyperspectral imaging have played important roles in mapping pigments, revealing hidden details, and evaluating restorations in paintings. In this study, a novel hyperspectral camera based on the Fourier transform approach is proposed, and its advantages and drawbacks compared to commonly used methods are discussed. The camera is demonstrated to be effective for pigment mapping through analysis routines based on supervised spectral unmixing. The study highlights the potential of the Fourier transform hyperspectral imaging camera for in situ investigation of artistic objects in museum and archaeological sites.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Energy & Fuels
Annalisa Polo, Maria Vittoria Dozzi, Ivan Grigioni, Charles Lhermitte, Nukorn Plainpan, Luca Moretti, Giulio Cerullo, Kevin Sivula, Elena Selli
Summary: Mo6+ doping enhances the photoelectrochemical performance of BiVO4 photoanodes in water oxidation. The mechanisms behind this improvement are revealed through transient absorption spectroscopy and impedance spectroscopy, showing that Mo6+ ions improve electron transport and surface properties of BiVO4 photoanodes.
Article
Chemistry, Physical
Ivan Grigioni, Annalisa Polo, Maria Vittoria Dozzi, Kevin G. Stamplecoskie, Danilo H. Jara, Prashant Kamat, Elena Selli
Summary: Photoelectrochemical water splitting is a technology that converts solar energy into oxygen and hydrogen. Research on WO3/BiVO4 heterojunction photoanodes shows that sensitizing WO3 with a BiVO4 layer can improve the efficiency of photo current.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Optics
Marco Piccardo, Michael de Oliveira, Veronica R. R. Policht, Mattia Russo, Benedetto Ardini, Matteo Corti, Gianluca Valentini, Jorge Vieira, Cristian Manzoni, Giulio Cerullo, Antonio Ambrosio
Summary: By introducing a diffractive axicon in a pulse shaper, topological-spectral correlation can be imparted to ultrafast pulses in the visible region with a large range of topological charges. This approach allows for the synthesis of ultrashort pulses with tailored spatial and temporal properties, enabling new possibilities in multimode photonics. The use of a diffractive axicon with circular geometry and a hyperspectral off-axis holography technique enables the control and manipulation of various properties of wave packets.
Article
Optics
B. Ardini, A. BAssI, A. Candeo, A. Genco, C. Trovatello, F. Liu, X. Zhu, G. Valentini, G. Cerullo, R. Vanna, C. Manzoni
Summary: Raman microscopy is a powerful technique for mapping the chemical composition of a sample. This paper presents a compact wide-field Raman microscope based on a time-domain Fourier-transform approach, allowing for parallel acquisition of Raman spectra on all pixels of a 2D detector. The system has high spatial and spectral resolutions and the ability to separate fluorescence and Raman signals.
Article
Optics
Alberto Ghezzi, Armin J. M. Lenz, Fernando Soldevila, Enrique Tajahuerce, Vito Vurro, Andrea Bassi, Gianluca Valentini, Andrea Farina, Cosimo D'Andrea
Summary: In this work, we propose a time-resolved multispectral fluorescence microscopy system based on the Single-Pixel Camera (SPC) scheme, which achieves high resolution and short measurement time using Compressive Sensing (CS) technology. Data Fusion (DF) with a high-resolution camera is used to address the low spatial resolution issue typical of SPC. By integrating hardware and algorithms, this system reduces the number of measurements while preserving the information content, allowing for a zoom feature without moving the optical system. The system is characterized in terms of spatial, spectral, and temporal properties, and is validated on a cellular sample.
Article
Nanoscience & Nanotechnology
Chiara Nomellini, Annalisa Polo, Camilo A. Mesa, Ernest Pastor, Gianluigi Marra, Ivan Grigioni, Maria Vittoria Dozzi, Sixto Gimenez, Elena Selli
Summary: The performance of composite WO3/BiVO4 photoanodes can be improved by nanostructuring the WO3 underlayer, mitigating charge transport and recombination issues.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemical Research Methods
Alessandro Bossi, Sanathana konugolu venkata Sekar, Michele Lacerenza, Valerio Gandolfi, Stefan Susnjar, Pranav Lanka, Cosimo D'andrea, Renzo Vanna, Gianluca Valentini, Andrea Farina, Antonio Pifferi
Summary: This study presents a novel approach for time-domain diffuse Raman spectroscopy (TD-DIRS), which allows for in-depth investigation of thick biological tissues. The system utilizes a single-pixel detector and a digital micromirror device (DMD) for wavelength encoding, offering a cost-effective and high-performance solution.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Chemistry, Physical
Ivan Grigioni, Annalisa Polo, Chiara Nomellini, Laura Vigni, Alessandro Poma, Maria Vittoria Dozzi, Elena Selli
Summary: This study investigated the photoelectrochemical performance of transparent CuWO4 electrodes and found that the electrodes with optimal thickness exhibit excellent visible light activity and charge extraction capability, with the charge recombination increasing at higher light intensity.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Biochemical Research Methods
Petra Paie, Gianmaria Calisesi, Alessia Candeo, Andrea Comi, Federico Sala, Francesco Ceccarelli, Ada De Luigi, Pietro Veglianese, Korbinian Muhlberger, Michael Fokine, Gianluca Valentini, Roberto Osellame, Mark Neil, Andrea Bassi, Francesca Bragheri
Summary: Heterogeneity investigation at the single-cell level is crucial in clinical research. The combination of light sheet fluorescence microscopy and structured illumination microscopy in an optofluidic platform enables high throughput super-resolution imaging, allowing comprehensive evaluation of cellular heterogeneity at high resolution.
Article
Biochemical Research Methods
Ali Ahmad, Federico Sala, Petra Paie, Alessia Candeo, Sarah D'Annunzio, Alessio Zippo, Carole Frindel, Roberto Osellame, Francesca Bragheri, Andrea Bassi, David Rousseau
Summary: Single-cell imaging and sorting are crucial in biology and clinical applications. The combination of microfluidics, fluorescence markers, and machine learning enhances the power of these technologies. However, the impact of sample flow velocity on classification performance poses a challenge. In this study, we demonstrate that high flow speed and accuracy in single-cell classification can be achieved in cancer cell screening. By analyzing both simulated and experimental data, we prove that the variability of acquired 3D volumes can be overcome by utilizing the 2D sum z-projection transformation and employing a convolutional neural network with transfer learning.