Article
Chemistry, Physical
Hyun Min Kim, Jong Hoon Lee, Ahram Yom, Han Sol Lee, Dong Geun Kim, Dong Wan Ko, Hong Seung Kim, Ji-Hoon Ahn
Summary: SrRuO3 thin films have the potential for use as electrode layers, with key parameters such as oxygen flow ratio and post-deposition conditions needing to be carefully controlled for high-quality films to be deposited on SiO2 substrates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Adem Yavuz, M. Fatih Danisman
Summary: We studied the vibrational properties and the effect of beam kinetic energy on PFP thin films grown by SMBD technique. We found significant differences in the properties of films grown using helium and argon carrier gasses for low coverage films and low deposition rates. However, for multilayer films, there were no significant differences between films grown with helium and argon. The vibrational properties were investigated using s-SNOM, and it was found that PFP-substrate interactions resulted in significant differences in the spectra of thin films but not thick films. Davydov splitting of the IR modes was observed for both thin and thick films, indicating similar molecular arrangements.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yannick Bleu, Florent Bourquard, Jean-Yves Michalon, Yaya Lefkir, Stephanie Reynaud, Anne-Sophie Loir, Vincent Barnier, Florence Garrelie, Christophe Donnet
Summary: This study demonstrates the transformation of amorphous carbon into free transfer graphene through pulsed laser deposition, with a focus on the dewetting process of the nickel catalyst film. By varying the thickness and temperature of pure nickel film, graphene synthesis on SiO2 substrate is achieved directly by controlling the parameters of nickel catalyst.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
S. Sarmah, M. Das, Bimal K. Sarma, D. Sarkar
Summary: This brief communication presents the photo sensing performances of the annealed Al+Au/n-ZnO:p-Si photodiode (PD). The PD can operate in self-powered mode, even without applied bias, and exhibits high switching on/off ratio and photoresponsivity up to 4.2 and 25 mAW(-1) respectively for the device annealed at 200 degrees C. Increasing the annealing temperature to 400 degrees C results in improved photoresponsivity and faster switching behaviors.
Article
Chemistry, Physical
N. Milicevic, M. Novakovic, J. Potocnik, M. Milovic, L. Rakocevic, N. Abazovic, D. Pjevic
Summary: Enhanced optical properties and photocatalytic activity of TiO2 thin films can be achieved by doping or coating with metals. In this study, TiO2-Au thin films were prepared using DC magnetron sputtering and annealing techniques, resulting in improved wettability and photo-degradation rates compared to pristine titania films.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Mechanical
Mao Ni, Yan Zhou, Zeqi Hu, Xunpeng Qin, Xiaochen Xiong, Feilong Ji
Summary: A novel weaving deposition strategy was developed to achieve a stable and consistent weld bead on complex curved surfaces in wire arc additive manufacturing. The effects of process parameters on geometric dimensions and formability of the woven weld bead were systematically investigated. Experimental results showed that the optimal parameters led to a stable and consistent weld bead with improved dimensional accuracy and surface quality on curved surfaces.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
J. C. Mahato, Debolina Das, Arindam Pal, Prabir Pal, B. N. Dev
Summary: Epitaxial gamma-FeSi2 and CoSi2 nanostructures grown on a vicinal Si(1 1 1)-7 x 7 surface have been investigated, revealing nanowires and nanoislands which could potentially find applications in nanoscale devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Rajib Kumar Nanda, Amitabha Nath, Laishram Robindro Singh, Mitra Barun Sarkar
Summary: The titanium dioxide (TiO2) nanowires (NW) were successfully deposited on a silicon (Si) substrate using the glancing angle deposition (GLAD) technique. A gold (Au) thin film (TF) was coated on the TiO2 NW and annealed at high temperature. The annealed Au TF/TiO2 NW based device showed enhanced electrical performance, including improved photosensitivity, rectification ratio, and low noise equivalent power, making it a reliable photodetector for commercial use.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Thi Ha Tran, Thi Mai Anh Nguyen, Vu Phuong Thao Dao, Cong Doanh Sai, Thanh Cong Bach, Nguyen Hai Pham, An Bang Ngac, Van Thanh Pham, Thi Kim Chi Tran, Hyeonsik Cheong, Viet Tuyen Nguyen
Summary: This study reports a facile process to fabricate CuO/Au core/shell nanowires, which show high sensitivity as SERS substrates capable of detecting methylene blue at concentrations as low as 10(-13) M. The major advantages of these SERS substrates are their sensitivity, uniformity, and purity without the presence of organic surfactants in the synthesis process.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Haolin Li, Jianwei Ding, Shuangfei Cai, Wei Zhang, Xining Zhang, Ting Wu, Chen Wang, Morten Foss, Rong Yang
Summary: This study fabricates noble metal-semiconductor hybrid Au/ZnO nanowires photocatalysts and characterizes them comprehensively. Compared with ZnO nanowires, Au/ZnO heterostructures exhibit significantly enhanced photocatalytic performance, providing a feasible strategy to prepare plasmonic photocatalysts.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Bin Luo, Avishek Banik, Eric W. Bohannan, Jay A. Switzer
Summary: CuSCN nanorods with good charge transport properties and high surface area have been successfully grown on Au(111) by a low-cost and highly scalable electrochemical method. The epitaxial CuSCN nanorods exhibit high in-plane and out-of-plane order.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bo Zhu, Yanwei Wu, Zeyi Zhou, Wenjie Zheng, Yuchen Hu, Yongfei Ji, Lingyao Kong, Rui Zhang
Summary: In this work, large electronic tuning on a WSe2 monolayer is achieved by using different facets of a Au-foil substrate, forming in-plane p-n junctions with remarkable built-in electric fields. This facet-dependent tuning effect is directly visualized by scanning tunneling microscopy and differential conductance spectroscopy. The atomic arrangement of the Au facet effectively changes the interfacial coupling and charge transfer, resulting in different magnitudes of charge doping in WSe2.
Article
Chemistry, Physical
Umamahesh Thupakula, Priya Laha, Gertjan Lippertz, Koen Schouteden, Asteriona-Maria Netsou, Aleksandr Seliverstov, Herman Terryn, Lino M. C. Pereira, Chris Van Haesendonck
Summary: Two-dimensional allotropes of tellurium, known as tellurene, have recently attracted attention in materials research due to their exotic properties in ultrathin form. This study reports the observation of three different 2D superstructures of tellurene on Au(111) surfaces using an alternative experimental deposition approach. The superstructures were characterized using scanning tunneling microscopy and spectroscopy, Auger electron spectroscopy, and field emission AES. The study found that the formation of these superstructures led to changes in the surface reconstruction of Au(111), and the electronic properties of the tellurium atoms showed a strong dependence on their structural arrangement. The emergence of band gaps with a p-type charge character was observed in two of the superstructures on Au(111).
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Shijie Sun, Baijin Li, Boyu Fu, Zilin Ruan, Hui Zhang, Wei Xiong, Yong Zhang, Gefei Niu, Jianchen Lu, Xiaoqing Zuo, Lei Gao, Jinming Cai
Summary: Nanoscale low-dimensional chiral architectures have attracted increasing scientific interest due to their potential applications in chiral recognition, separation, and transformation. In this study, large-area two-dimensional chiral networks on Au(111) and one-dimensional metal-liganded chiral chains on Cu(111) were successfully constructed and characterized. The chiral transformation of the chiral networks on Au(111) was analyzed, and the electronic state information was studied using scanning tunneling spectroscopy. The combination of scanning tunneling microscopy and non-contact atomic force microscopy techniques enabled ultra-high-resolution characterization of chiral structures on low-dimensional surfaces.
CHINESE CHEMICAL LETTERS
(2022)
Article
Polymer Science
Merve Dandan Doganci
Summary: A superhydrophobic cyclic olefin copolymer (COC) nanocomposite coating was synthesized using a simple dip coating method with hydrophobic SiO2 nanoparticles. The surfaces exhibited high water contact angle of 169° and showed superior water repellency, high transparency, and self-cleaning properties. The influence of SiO2 concentration and coating temperatures on the surface wettability was investigated, revealing the potential of these coatings for various applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Analytical
Francesco Ruffino
Summary: Bimetallic nanoparticles exhibit unique properties for various technological applications, particularly in terms of optical properties and their interaction with electromagnetic radiation. The core-shell structure significantly affects the optical properties of these nanoparticles.
Article
Materials Science, Multidisciplinary
Antonino Scandurra, Maria Censabella, Stefano Boscarino, Maria Grazia Grimaldi, Francesco Ruffino, Guglielmo Guido Condorelli, Graziella Malandrino
Summary: Nanostructures of Cu2O/CuO hydroxide suitable for electrochemical determination of glucose were obtained through solid-state dewetting, with high-index crystallographic facets reactive towards glucose oxidation. These electrodes exhibit linear response to glucose concentration, high sensitivity, and low limit of detection, making them suitable for various applications.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Maria Censabella, Cristina Drago, Brunella Cafra, Paolo Badala, Anna Bassi, Giovanni Piccitto, Salvatore Mirabella, Maria Grazia Grimaldi, Francesco Ruffino
Summary: This study focuses on investigating the properties of nanoscale-thick Ti/TiN, TiN, W, WN layers as diffusion barriers between Si and Al for Si-based electronic applications. Heat treatments were conducted to activate interdiffusion between Si and Al, and samples were morphologically and compositionally characterized. The goal is to evaluate the efficiency of the layers as diffusion barriers and to assess surface morphological changes during annealing processes.
Article
Chemistry, Analytical
Francesco Ruffino
Summary: The localized surface plasmon resonance properties of Ag and Au nanostructures make them increasingly interesting for enhancing light trapping in solar cell devices. This study using Mie theory investigates the angle-dependent light scattering intensity for Ag and Au nanoparticles coated with AZO, ITO, or PEDOT:PSS shells, showing that the core-shell sizes significantly affect the light scattering properties of nanoparticles.
Article
Chemistry, Physical
F. Ruffino, M. G. Grimaldi
Summary: This work investigates the impact of annealing temperature on the size, shape, and wetting behavior of particles obtained on 4H-SiC substrate through the dewetting process of a deposited nanoscale-thick Au film. Various analyses are conducted to quantify the evolution of particle characteristics with annealing temperature, and a general framework is proposed to connect process parameters to the nanoshape of the dewetted particles for specific applications.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Analytical
Stefano Boscarino, Maria Censabella, Melanie Micali, Marco Russo, Antonio Terrasi, Maria Grazia Grimaldi, Francesco Ruffino
Summary: Cu nanostructures were obtained using different methods, with the main differences between the wet and dry processes being the shape and size of the nanostructures. The dry system exhibited better electrical properties after thermal annealing, while the wet system showed higher transmittance in the NUV wavelength range.
Article
Chemistry, Analytical
Antonino Scandurra, Maria Censabella, Antonino Gulino, Maria Grazia Grimaldi, Francesco Ruffino
Summary: This study proposes new nanoelectrode arrays for high Faradaic efficiency of the electro-sorption reaction of hydrogen in alkaline electrolyte. The effects of different compositions and thin films on the efficiency of the nanoelectrode arrays were investigated, resulting in systems with Faradaic efficiency up to 86.6% and hydrogen storage capacity up to 6%.
Article
Biochemistry & Molecular Biology
Stefano Boscarino, Valentina Iacono, Andrea Lo Mastro, Fiorella Tringali, Antonio Terrasi, Maria Grazia Grimaldi, Francesco Ruffino
Summary: In this study, Cu nanoparticles were prepared via solid-state dewetting and laser ablation methods, and were embedded in transparent conductive oxide films to create plasmonic conductive structures. The morphology and chemical composition of the nanoparticles were found to depend on the annealing temperature and liquid environment. By comparing different structures, the researchers evaluated their performance in photovoltaic applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Antonino Scandurra, Valentina Iacono, Stefano Boscarino, Silvia Scalese, Maria Grazia Grimaldi, Francesco Ruffino
Summary: Recently, the hydrogen evolution reaction (HER) in alkaline media has gained attention in both fundamental research and practical applications. Pulsed Laser Ablation in Liquid (PLAL) has shown promise for preparing nanomaterials with excellent electro-catalytic properties for HER. In this study, Pt, Pd, Pt80Pd20, and Cu(OH)(2) nanoparticles (NPs) prepared by PLAL were compared for their hydrogen electro-sorption properties in alkaline media. The NPs were placed onto graphene paper (GP) to enhance their electro-catalytic properties. The proposed mechanisms for HER on noble metals and Cu(OH)(2) were consistent with the adsorption energies of H, OH, and H2O.
Editorial Material
Materials Science, Multidisciplinary
Francesco Ruffino
Article
Physics, Condensed Matter
Valentina Iacono, Salvatore Mirabella, Francesco Ruffino
Summary: Electrochemical water-splitting using renewable energy is aimed at producing green H-2. Efficient and sustainable electrocatalysts, such as Ni oxyhydroxides, are needed for a proper energy transition. Optimizing the intrinsic properties and synthesis procedure is still necessary.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Antonino Scandurra, Valentina Iacono, Stefano Boscarino, Silvia Scalese, Maria Grazia Grimaldi, Francesco Ruffino
Summary: Non-enzymatic electrochemical glucose sensors play a crucial role in biomedical applications, enabling portable diabetic testing kits and continuous glucose monitoring systems. Nanostructured materials offer several advantages, such as high sensitivity and reduced dependence on analyte diffusion near the electrode-solution interface. This study focuses on modeling the chronoamperometric response of four electrodes made of nanostructured gold onto graphene paper.
Article
Materials Science, Multidisciplinary
Chawki Awada, Francesco Ruffino
Summary: In this study, the effect of laser-assisted alloying on the plasmonic properties of Pd and Au-Pd nanostructures was analyzed using surface-enhanced Raman spectroscopy (SERS). The morphology of the nanostructures was controlled by adjusting the laser fluence, and 4-nitrithiophenol (4-NTP) was used as an adsorbed molecule to determine the resulting SERS properties. The results showed a strong correlation between the variation in SERS properties and the size of the nanostructures. The optical enhancement factor was estimated for Pd and Au-Pd nanostructures at different laser fluences.
Article
Nanoscience & Nanotechnology
Regina Maria Chiechio, Angela Caponnetto, Rosalia Battaglia, Carmen Ferrara, Ester Butera, Paolo Musumeci, Riccardo Reitano, Francesco Ruffino, Giuseppe Maccarrone, Cinzia Di Pietro, Valerie Marchi, Luca Lanzano, Giovanni Arena, Alfina Grasso, Chiara Copat, Margherita Ferrante, Annalinda Contino
Summary: This research focuses on functionalizing lanthanide-doped nanoparticles to confer water solubility and biocompatibility. It investigates the toxicological properties of the nanoparticles and their internalization within cancer cells, revealing a strong correlation between fluorescence intensity and nanoparticle concentrations. The findings are of significant importance to the fields of nanotechnology and biomedical research.
ACS APPLIED NANO MATERIALS
(2023)
Article
Humanities, Multidisciplinary
Stefania Pasquale, Massimo Zimbone, Francesco Ruffino, Giuseppe Stella, Anna Maria Gueli
Summary: This study evaluates the use of nanomaterials in painting conservation and cleaning practices, focusing on the effectiveness of titanium dioxide nanoparticles on historical painting surfaces for self-cleaning and protection. Various aspects of the painting were investigated and assessed using TiO2 nanoparticles prepared through Pulsed Laser Ablation in Liquids, with a particular focus on color changes induced by protective and cleaning interventions.