Article
Nanoscience & Nanotechnology
Stephanie Nicole Bonvicini, Bo Fu, Alison Joy Fulton, Zhitai Jia, Yujun Shi
Summary: The formation of Au, Pt, and bimetallic Au-Pt nanostructures by thermal dewetting of single-layer Au, Pt and bilayer Au-Pt thin films on Si substrates was systematically studied. The dewetting process involves heterogeneous void initiation followed by void growth via capillary agglomeration. The size of the resulting nanoparticles is strongly influenced by the initial thin film thickness. The increased resistance to thermal dewetting in the Au-Pt bilayer films is attributed to the stabilizing effect of Pt in the bimetallic system.
Article
Chemistry, Physical
Xia Qiu, Haifeng Wei, Renjia Li, Yongxin Li
Summary: Bimetallic Au@Pt/Au NPs with triple-layered core-shell structure were successfully prepared and characterized. The single Au@Pt/Au NPs exhibited size-dependent properties for vol-tametric response and electron-transfer rate, and showed excellent electrocatalytic activity, long-term tolerance, and anti-toxicity compared with traditional Pt catalyst. This work provides new insight into conventional electrocatalysis and offers a platform for designing entirely new catalysts at single NPs level.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
R. Fathima, A. Mujeeb
Summary: Ligand-free Au-Pt bimetallic nanoparticles were synthesized using laser ablation, showing enhanced nonlinear optical and thermo optical characteristics compared to mono metallic nanoparticles and pre-irradiation colloidal mix.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Sofia Rubtsov, Albina Musin, Michael Zinigrad, Alexander Kalashnikov, Viktor Danchuk
Summary: This study introduces a novel approach to produce TiO2/AuNP films, which show potential for application in solar cells.
Article
Chemistry, Multidisciplinary
Jijie Huang, Han Wang, Zhimin Qi, Ping Lu, Di Zhang, Bruce Zhang, Zihao He, Haiyan Wang
Summary: The research focused on a new metal-oxide VAN with plasmonic Au nanopillars embedded in a ferromagnetic LSMO matrix, showing tunable optical and magnetic properties.
Article
Chemistry, Multidisciplinary
Bethany X. Rutherford, Hongyi Dou, Bruce Zhang, Zihao He, James P. Barnard, Robynne L. Paldi, Haiyan Wang
Summary: Nanocomposite thin film materials processed through non-equilibrium methods exhibit unique metastable phases and microstructures, leading to novel physical properties. In this study, the phase and morphology of Au and Fe nanoparticles in a BaTiO3 matrix were successfully controlled by adjusting the deposition laser frequency, allowing for the tuning of magnetic and optical properties. This work demonstrates the stabilization of non-equilibrium alloy structures in the VAN form and provides a potential avenue for exploring new non-equilibrium materials systems and their properties.
Article
Nanoscience & Nanotechnology
Fatemeh Sadat Razavi, Davood Ghanbari, Elmuez A. Dawi, Masoud Salavati-Niasari
Summary: Photocatalysis is a promising strategy for reducing water pollution. Pt-Au/TiO2/BaFe12O19 nanofibers were synthesized using the electro-spinning technique. The nanocomposite showed excellent photocatalytic performance under visible light, achieving a high decolorization rate and reaction rate coefficient for Acid Red 14. The study demonstrated the potential of noble metals Pt and Au in enhancing dye degradation.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Jie-Jun Wang, Tao Wang, Chuan-Gui Wu, Wen-Bo Luo, Yao Shuai, Wang-Li Zhang
Summary: A multilayer resistive temperature sensor (Ti/Pt/Cr/Au) was proposed and investigated for precise temperature measurement in microfluidic devices. The sensor exhibited excellent stability and sensitivity during the annealing process, with through-thickness migration of chromium and partial depletion of the adhesive layer. The capability of the sensor to detect sudden temperature changes caused by bubble effects is significant for microfluidic devices.
Article
Chemistry, Analytical
Vadym Borysiuk, Iakov A. Lyashenko, Valentin L. Popov
Summary: Thermal stability of triple layered Au@Pt@Au core-shell nanoparticles for H2O2 bi-directional sensing was investigated through computational study. The raspberry-like shape of the nanoparticles and their structural parameters were studied using classical molecular dynamics simulations. The results showed that the core-shell structure of the nanoparticles was maintained up to approximately 900 K, but was destroyed at higher temperatures.
Article
Chemistry, Multidisciplinary
Patricia Pereira-Silva, Diana Meira, Augusto Costa-Barbosa, Diogo Costa, Marco S. Rodrigues, Joel Borges, Ana Machado, Albano Cavaleiro, Paula Sampaio, Filipe Vaz
Summary: This study reports the development of an optical biosensor based on localized surface plasmon resonance (LSPR) and the use of plasmonic thin films containing Au nanoparticles as its platform. The efficiency and potential of the biosensor platform were demonstrated through post-deposition treatments and functionalization methods.
Article
Chemistry, Physical
Sujin Lee, Yongkwon Song, Jinhan Cho, Youn Jeong Jang, Bongjun Yeom
Summary: In this study, Au-Pt bimetallic nanocomposite electrodes for the hydrogen evolution reaction (HER) were prepared using a layer-by-layer self-assembly method. The resulting Au-Pt samples demonstrated lower overpotentials and a significantly small Pt loading.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Hye Hyeon Han, Sang-Mun Jung, Su-Kyung Kim, Geon-Hui Lee, Seong-Jong Kim, Yong-Tae Kim, Sei Kwang Hahn
Summary: In this study, a bimetallic electrocatalyst of hyaluronate-Au@Pt was synthesized to enhance the oxygen reduction reaction performance of biofuel cells. Hyaluronate, as a biocompatible polysaccharide, was used to improve the dispersibility and stability of the electrocatalyst. The optimized electrocatalyst showed high open circuit voltage and maximum current density, demonstrating its potential in energy generation.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ajay P. Manuel, Saralyn Riddell, Harshitha Rajashekhar, Damini Vrushabendrakumar, Kazi M. Alam, Pawan Kumar, Sergey Gusarov, Alexander E. Kobryn, Mustafa Supur, Richard L. McCreery, Karthik Shankar
Summary: Core-shell Au@Pt nanoislands were fabricated on glass substrates using magnetron sputtering and thermal annealing. Addition of ultrathin Pt shells caused redshift and broadening of the localized surface plasmon resonance peak of Au. The coated Au@Pt nanoislands showed superior methylene blue degradation performance and hot carrier injection was validated by Raman thermometry studies.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Kecheng Wei, Honghong Lin, Xueru Zhao, Zhonglong Zhao, Nebojsa Marinkovic, Michael Morales, Zhennan Huang, Laura Perlmutter, Huanqin Guan, Cooro Harris, Miaofang Chi, Gang Lu, Kotaro Sasaki, Shouheng Sun
Summary: Efficient cleavage of C-C bonds and oxidation of alcohols to CO2 is crucial for the development of highly efficient alcohol fuel cells. In this work, core/shell Au/Pt nanowires with stepped Pt clusters deposited on ultra-thin Au nanowires are synthesized as an active catalyst for alcohol oxidation. The Au-1.0/Pt-0.2 nanowires show the highest activity for ethanol electro-oxidation and also exhibit activity for other primary alcohols. The study provides important evidence and insights for enhancing electrochemical oxidation of alcohols and future development of direct alcohol fuel cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Heon Chul Kim, Jong Wook Hong
Summary: Highly porous Au-Pt urchin-like bimetallic nanocrystals were prepared by a one-pot wet-chemical synthesis method, with the porosity controlled by the amount of hydrazine used as reductant. Due to their unique morphology leading to high porosity and surface active sites, the prepared nanocrystals were superior catalysts for electrochemical methanol oxidation. This approach opens up possibilities for designing bimetallic porous materials with unprecedented functions.
Review
Materials Science, Multidisciplinary
Luis Enrique Vivanco-Benavides, Claudia Lizbeth Martinez-Gonzalez, Cecilia Mercado-Zuniga, Carlos Torres-Torres
Summary: Machine learning has been successfully utilized in modeling physical properties of carbon nanotubes, with a focus on algorithms such as artificial neural networks, support vector machines, decision trees, random forests, and K-Nearest Neighbors. Furthermore, the importance of analyzing mechanical, thermal, electrical, and electronic properties of carbon nanotubes has been highlighted in this review.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Eric Abraham Hurtado-Aviles, Maria Vila, Juan Jose Vilatela, Hilario Martines-Arano, Jhovani Bornacelli, Jose Antonio Garcia-Merino, Felipe Cervantes-Sodi, Carlos Torres-Torres
Summary: This study reports a significant influence of a magnetic field on the third-order nonlinear optical properties exhibited by aggregated networks of aligned carbon nanotubes, showing that the presence of a magnetic field can modify the optical transmittance in the sample and potentially generate structured light. Numerical simulations were conducted to analyze the magnetic field phenomena and electric field oscillations in the studied sample. Applications of this system to modulate structured light are immediate possibilities.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Cesar Carrillo-Delgado, Monica Araceli Vidales-Hurtado, Hilario Martines-Arano, David Torres-Torres, Gina Gallegos-Garcia, Claudia Lizbeth Martinez-Gonzalez, Carlos Torres-Torres
Summary: This article analyzes how an electric field can induce a band gap shift in NiO films to enhance their third-order optical nonlinearities. It suggests that an electrochromic effect is responsible for changes in absorbance and modification in off-resonance nonlinear refractive index. The optical Kerr effect is identified as the main physical mechanism in a nanosecond two-wave mixing configuration at 532 nm wavelength. The absence of multi-photon absorption is confirmed by the constant trace of high-irradiance optical transmittance in single-beam mode. The study of nonlinear optical signals allows the proposal of an exclusive disjunctive logic gate assisted by an electrochromic effect in an optical Kerr gate. The influence of a switchable probe beam transmittance and electrical signals on asymmetric encryption by the XOR system is also studied. Immediate applications for developing multifunctional quantum systems driven by dynamic parameters in electrochromic and nonlinear optical materials are emphasized.
Article
Environmental Sciences
Luis Antonio Aguilar-Perez, Christopher Rene Torres-SanMiguel, Marco Ceccarelli, Guillermo Manuel Urriolagoitia-Calderon
Summary: This study evaluates the relationship between rib compression and absorbed energy using a model constructed from CT studies and verified through comparison with a virtual rib reconstruction.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Ivan Lenin Cruz-Jaramillo, Luis Martinez-Saez, Christopher Rene Torres-SanMiguel
Summary: This research evaluates the mechanical coupling of the ISOFIX Child Restraint System in a critical condition using the Finite Element Method. Two case studies were conducted to assess the behavior of the mechanism and its impact on head and neck injuries during a frontal collision. The results demonstrate the effectiveness of the mechanical coupling in reducing these injuries.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Christopher Rene Torres-SanMiguel
Summary: This research presents a methodology for designing low-cost prosthesis manufacturing, focusing on an upper limb prosthesis with seven degrees of freedom. The research optimized the components responsible for the movement of the prosthesis under maximum loads during simplified routines. The results classify the manufactured pieces based on different manufacturing methods.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Hilario Martines-Arano, Samara Palacios-Barreto, Juan Castillo-Cruz, Jesus Alberto Meda-Campana, Blanca Estela Garcia-Perez, Carlos Torres-Torres
Summary: This study experimentally controlled the modification in thermal transfer mechanisms induced by light in human lung epithelial cancer cells using chaotic attractors dependent on optical transmittance. The evolution of a chaotic modulation driven by optical signals was studied in cells integrated in monolayer form, and photodamage in the samples was identified by measuring transmitted light modulated by the Chen equations. Comparative experiments revealed the crucial role of multi-photonic processes in the resulting photothermal phenomena.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Review
Chemistry, Analytical
Jose Alberto Arano-Martinez, Claudia Lizbeth Martinez-Gonzalez, Ma Isabel Salazar, Carlos Torres-Torres
Summary: The ability to interpret information through automatic sensors is crucial in modern technology. Biosensors have great potential in evaluating biological information and detecting danger, especially in the context of the ongoing SARS-CoV-2 pandemic. This article provides a comprehensive overview of optical biosensors, emphasizing the role of nonlinear optics and machine learning in improving their performance. The use of multiphoton interactions and nonlinear optical effects opens up new possibilities for expanding the applications of optical biosensors. Machine learning methods can also be utilized to identify complex agents and patterns in detecting dynamic objects in the human body.
Article
Engineering, Electrical & Electronic
Cesar Carrillo-Delgado, Jose Alberto Arano-Martinez, Monica Araceli Vidales-Hurtado, David Torres-Torres, Claudia Lizbeth Martinez-Gonzalez, Carlos Torres-Torres
Summary: This report analyzes the asymmetry effects of an electric field on nonlinear optical signals in NiO thin solid films. The samples were prepared using a spray pyrolysis method and had a thickness of approximately 110 nm. The change in nonlinear refractive index was evaluated by nanosecond pulses at 532 nm using the z-scan technique. Nonlinear optical absorption was confirmed to be absent before ablation occurs in the nonlinear media. Numerical simulations were conducted to analyze non-reciprocal energy transfer and the optical Kerr effect under an applied voltage. Potential applications include controlling nonlinear waveguiding structures and optical systems with multidirectional functions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Samuel Morales-Bonilla, Isaac I. Mota-Diaz, Janna Douda, Ariel Fuerte-Hernandez, Juan Pablo Campos-Lopez, Carlos Torres-Torres
Summary: This study analyzes the optical effects of blood plasma under healthy/unhealthy conditions and the evolution of nanovehicles composed of nanodiamonds (NDs) encapsulating liposomes (L) in these biofluids. Optical ablation of liposome clusters was achieved and controlled using a standard two-wave mixing laser light method. The release of NDs was facilitated by thermal damage during the sedimentation process of the nanovehicles interacting with the laser beams barrier. The findings of this research include the threshold temperature for the release of NDs from liposomes and the assessment of the release based on the numerical magnitude of Quantum Yield.
Article
Mathematics
Didier Samayoa, Alexandro Alcantara, Helvio Mollinedo, Francisco Javier Barrera-Lao, Christopher Rene Torres-SanMiguel
Summary: In this paper, a generalization of the Timoshenko beam theory based on fractal continuum calculus is proposed. By using local fractional differential operators, the bending problem is mapped onto a non-differentiable self-similar beam, leading to a corresponding problem for a fractal continuum. The functions defined in the fractal continuum beam are differentiable in the ordinary calculus sense, and the non-conventional local derivatives can be expressed in terms of ordinary derivatives, which are solved theoretically and numerically. Finally, examples of classical beams with different boundary conditions are provided for further investigation of the studied physical phenomenon.
Article
Mathematics, Interdisciplinary Applications
Arturo Yishai Prieto-Vazquez, Alejandro Cuautle-Estrada, Mario Alberto Grave-Capistran, Octavio Ramirez, Christopher Rene Torres-SanMiguel
Summary: This research presents an image processing method to investigate the mechanical behavior of liver tissue under physiological damage caused by fibrosis. A CAD/CAE model and fractal analysis were used to analyze the deformations and displacements of the liver tissue.
FRACTAL AND FRACTIONAL
(2023)
Article
Materials Science, Biomaterials
Marcial Francisco Hernandez-Ortega, Christopher Rene Torres-San Miguel, Elliot Alonso Alcantara-Arreola, Juan Carlos Paredes-Rojas, Ohtokani Cabrera-Rodriguez, Guillermo Manuel Urriolagoitia-Calderon
Summary: Interspinous spacers are minimally invasive surgical devices used to treat degenerative lumbar diseases. This study utilized the finite element method to assess the stresses and deformations of an interspinous spacer with steel wire clamping. The results showed that the spacer effectively reduced pressures within the disc and facets, providing stability for the vertebrae.
Article
Chemistry, Multidisciplinary
Fernando Guevara-Leon, Mario Alberto Grave-Capistran, Juan Alejandro Flores-Campos, Jose Luis Torres-Ariza, Elliot Alonso Alcantara-Arreola, Christopher Rene Torres-SanMiguel
Summary: According to the World Health Organization, approximately 1.3 billion people worldwide have visual impairments. Daily exposure to luminous beams can cause corneal injuries. By reconstructing a three-dimensional model and utilizing the Finite Element Method, researchers found that light emitted from smartphone screens can lead to structural deformations in the cornea.
APPLIED SCIENCES-BASEL
(2023)
