Article
Multidisciplinary Sciences
Sara M. Franzen, Magdalena Tasic, Christian B. M. Poulie, Martin H. Magnusson, Daniel Strand, Maria E. Messing
Summary: The study found that the choice of solvent needs to be carefully matched with both the particle and support materials, and thermal annealing significantly increases the adhesion of the particles, expanding the scope of applications in aqueous media and for biological applications. The research provides valuable methods for investigating the stability of nanoparticle systems after exposure to solvents.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Rashid Khan, Yuqi Xing, Jianwen Wang, Lu Huang, Jianhua Zhu, Xiuli Zhu, Yingpeng Wu
Summary: The core-shell SnSe@TiO2/C heterostructure composite demonstrates high reactivity and superior electrochemical performance in sodium-ion batteries. The TiO2 shell enhances the mechanical stability of SnSe, while the synergistic effects of the core-shell structure optimize ion diffusion kinetics and cycling stability. This novel composite shows promising potential as an anode material for high-performance SIBs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Jaya Verma, Avi Gupta, Deepak Kumar
Summary: This research focused on developing a highly efficient and cost-effective multifunctional nanocoating by incorporating silica-titania core-shell particles into polyurethane for various applications. The core-shell structure combined the mechanical properties improvement of silica with the antimicrobial and hydrophobic enhancement of titania. Through testing and analysis, it was found that a concentration of 4% (wt) of nano core-shell particles in the PU coating system produced the best results for multipurpose applications.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Optics
Lijie Wang, Tsz Him Chow, Malte Oppermann, Jianfang Wang, Majed Chergui
Summary: We report on the deep-to-near-UV transient absorption spectra of Au/SiO2 and Au/TiO2 core-shell nanoparticles (NPs) and UV-excited bare anatase TiO2 NPs. The presence of electrons/holes in the conduction/valence band of the material is indicated by the bleaching of the first excitonic transition of anatase TiO2 at -3.8 eV. Two-photon excitation does not occur in bare TiO2 NPs, but takes place in the TiO2 shell of Au/TiO2 core-shell NPs due to plasmon resonance enhancement. The bleach of the 3.8 eV band of TiO2 lives significantly longer in the core-shell NPs, indicating longer storage of excess electrons/holes.
PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ping Wang, Luwei Zhang, Zhenxi Zhang, Sijia Wang, Cuiping Yao
Summary: Photodynamic therapy (PDT) is a promising tumor therapy, but the aggregation of hematoporphyrin monomethyl ether (HMME) reduces its efficiency. In this study, a stable Au@TiO2 core-shell nanostructure with HMME was synthesized and factors influencing PDT efficiency were studied.
Article
Chemistry, Multidisciplinary
Jeannie Z. Y. Tan, Stelios Gavrielides, M. Mercedes Maroto-Valer
Summary: Propylene carbonates are important solvents and feedstocks, and their sustainable production using CO2 and solar energy is crucial. Developing microstructured photocatalysts with desired properties plays a key role in efficient propylene carbonate production.
Article
Chemistry, Applied
Kang Li, Liang Yu, Juanjuan Cai, Lixiong Zhang
Summary: In this study, C@TiO2 core-shell adsorbents with large surface area and hierarchical pores were successfully prepared, showing high adsorption capacity for cationic dyes. The adsorbents maintained high adsorption capacity after multiple cycles, demonstrating potential practical applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Kunlei Wang, Zuzanna Bielan, Maya Endo-Kimura, Marcin Janczarek, Dong Zhang, Damian Kowalski, Anna Zielinska-Jurek, Agata Markowska-Szczupak, Bunsho Ohtani, Ewa Kowalska
Summary: Titania is a commonly used photocatalyst with important environmental applications, but it has shortcomings such as charge carrier recombination and inactivity under visible light. Doping, surface modification, and coupling with other ions/compounds have been used to enhance the activity of titania-based photocatalysts, but stability remains a challenge.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Aaron Bayles, Shu Tian, Jingyi Zhou, Lin Yuan, Yigao Yuan, Christian R. Jacobson, Corbin Farr, Ming Zhang, Dayne F. Swearer, David Solti, Minghe Lou, Henry O. Everitt, Peter Nordlander, Naomi J. Halas
Summary: This study introduces Al@TiO2 core-shell nanoparticles as active photocatalysts for hot electron-mediated H-2 dissociation reaction and hot hole-mediated methanol dehydration. The research indicates that the photocatalytic mechanism involves plasmonic hot carrier generation and subsequent transfer into the TiO2 layer. The Al@TiO2 antenna-reactor offers an earth-abundant solution for the future design of visible-light-driven plasmonic photocatalysts.
Article
Materials Science, Ceramics
Igor V. Zagaynov, Anatoly A. Konovalov
Summary: A series of CeO2-TiO2 composites were synthesized using the sol-gel method, and their structures were investigated using HR TEM, XRD, TG-DSC-MS, N2 adsorption-desorption isotherms. The titania coating layer consisting of fine crystallites contributes to the properties of the CeO2@TiO2 nanocomposite. A fast, simple, and facile route for synthesizing novel CeO2@TiO2 core-shell nanocomposite particles was suggested. Increasing the concentration of the titania precursor was found to increase the shell thickness but also led to the formation of a small amount of independent titania clusters. The increase in titania content resulted in a larger proportion of the rutile phase and a decrease in the proportion of metastable anatase and brookite, while reducing the particle size of the initial ceria core and the specific surface area due to the closer connections between nanoparticles caused by the titania shells.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Alexandra Karapa, Christos Kokkinos, Peter R. Fielden, Sara J. Baldock, Nickolas J. Goddard, Anastasios Economou, Mamas I. Prodromidis
Summary: This study reports the fabrication of a low-cost and eco-friendly sensor platform for voltammetric determination of trace metals by electrochemical stripping analysis. The platform consists of plastic conductive electrodes manufactured via injection moulding, with carbon fibers reinforced polystyrene as the material. The sensor fabrication and modification procedures are simple, cost-effective, and fast, and the materials used are environmentally friendly. The platform shows potential for electrochemical sensing of trace metals, as demonstrated by its utility in the stripping analysis of Cd(II) and Pb(II) in water and food samples.
Article
Chemistry, Multidisciplinary
Julien Reboul, Z. Y. Li, Jun Yuan, Kazuki Nakatsuka, Masakazu Saito, Kohsuke Mori, Hiromi Yamashita, Yu Xia, Catherine Louis
Summary: This study successfully prepared small gold-nickel bimetallic nanoparticles supported on titania using the galvanic replacement reaction method. It was shown that this preparation method allowed control of gold and nickel contents, resulting in the formation of small bimetallic nanoparticles with strained core-shell structures. Catalytic characterization revealed that nickel-based nanocatalysts containing a small amount of gold exhibited higher selectivity and activity compared to pure nickel catalysts.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Ningkang Qian, Degong Ding, Liang Ji, Junjie Li, Hui Zhang, Deren Yang
Summary: In this study, three types of core-shell nanocrystals, Au73Pd27@Pt, Au66Pd34@Pt, and Pd@Pt, were successfully constructed using lattice engineering. The strain effect and ligand effect caused by Au were found to enhance the activity of Pt in the electrocatalytic CO2 reduction reaction (EOR). In situ FTIR studies confirmed that the EOR processes on these nanocrystals were dominated by the C2 pathway, which explained the enhancement of EOR activity by the faster kinetics of the C2 pathway producing acetate or acetaldehyde.
Article
Materials Science, Ceramics
Olga A. Shilova, Anastasiya S. Kovalenko, Anton M. Nikolaev, Sergey Mjakin, Alexander A. Sinel'nikov, Vladimir P. Chelibanov, Yulia E. Gorshkova, Nataliya Tsvigun, Olim N. Ruzimuradov, Gennady P. Kopitsa
Summary: The surface of TiO2 nanoparticles was modified with silica prepared by acid hydrolysis, resulting in a twofold increase in specific surface area. The modification also changed the surface functionality from Lewis acidity to Brönsted acidity. The resulting TiO2@SiO2 core-shell particles exhibited significantly enhanced singlet oxygen generation and photocatalytic activity.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Abdisa Habtamu, Masaki Ujihara
Summary: Environmental pollution is a global concern, and solar energy-driven photocatalysis shows promise for pollutant decomposition in water systems. This study analyzed the efficiency and mechanism of WO3-loaded TiO2 nanocomposites with different structures. The nanocomposites were synthesized using sol-gel reactions and core-shell approaches, and their photocatalytic activity was analyzed for the degradation of methylene blue and methyl orange. The results showed that adjusting the nanocomposite structure could control the photoreaction mechanisms. These findings have implications for the design of photocatalysts for environmental remediation.
Article
Optics
Abeer A. Shehab, S. K. Sadrnezhaad, M. J. Torkamany, M. Fakouri Hasanabadi, Muhaed Alali, A. K. Mahmoud, Mohammed H. Abass, A. H. Kokabi
Article
Chemistry, Inorganic & Nuclear
Shervin Daneshvar e Asl, Sayed Khatiboleslam Sadrnezhaad
SOLID STATE SCIENCES
(2020)
Article
Chemistry, Physical
Navid Ghane, S. K. Sadrnezhaad, Seyed Morteza H. Hosseini
APPLIED SURFACE SCIENCE
(2020)
Article
Materials Science, Coatings & Films
Arghavan Goudarzi, S. K. Sadrnezhaad, Narges Johari
Summary: Advanced nanoscale coating methods on orthopedic implant surfaces have significantly improved implantation success by allowing adjustable drug release and enhancing biocompatibility. The combination of silk fibroin nanofibers and titanium oxide nanotube arrays has been shown to create a well-controlled drug delivery system with excellent cell biocompatibility.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Milad Sabzehparvar, Fatemeh Kiani, Nooshin Salman Tabrizi
Summary: This study presents a magnetically-recyclable TiO2-NiO-Ag p-n/Schottky heterojunction photocatalyst with enhanced photocatalytic activity, showcasing its potential for practical application in environmental remediation and other photocatalytic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Pharmacology & Pharmacy
Navid Rakhshani, Nahid Hassanzadeh Nemati, Ahmad Ramazani Saadatabadi, S. K. Sadrnezhaad
Summary: Nano metal-organic frameworks (NMOFs), such as UiO-66-NH2, have been developed as drug delivery systems due to their high porosity and specific surface area, with PNVCL coating providing a dual pH/temperature-responsive nanocomposite against A549 lung cancer cells. Characterization studies including FTIR, H-1 NMR, DLS, XRD, SEM, FESEM, TGA, and BET analysis were conducted to evaluate the synthesized nanocarriers. The results indicated the significant potential of UiO-66-NH2/DOX/PNVCL dual-responsive nanocomposite for effective delivery of anticancer drugs.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Gholam Reza Dabbagh, S. K. Sadrnezhaad, Reza Shoja Razavi, Amir Abbas Nourbakhsh, Nahid Hassanzadeh Nemati
Summary: Creating laser texture on dental implants using a pulse Nd:YAG laser can accelerate osseointegration. The study found that the lowest contact angle and highest surface free energy occurred at a 60° intersecting lines angle.
JOURNAL OF LASER APPLICATIONS
(2021)
Article
Engineering, Biomedical
Seyed Yahya Rahnamaee, Shahab Ahmadi Seyedkhani, Aylar Eslami Saed, Sayed Khatiboleslam Sadrnezhaad, Ashkan Seza
Summary: This study investigated the effects of different bioinspired coatings on titanium alloy surfaces to address common issues in hard-tissue implant failure. The results showed that these coatings could enhance the adhesion strength between coatings and titanium alloy, and exhibited good cell viability and mechanical properties, which could potentially improve the long-term stability of implants.
BIOMEDICAL MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Roghayeh Haghjoo, Sayed-Khatiboleslam Sadrnezhaad, Nahid Hassanzadeh-Nemati
Summary: Integrating implants with the surrounding bone tissue is a significant challenge in medical engineering. In this study, titanium foams with various pore morphologies were fabricated using powder metallurgy and their influence on cell attachment was evaluated. The results provide valuable insights for the application of porous titanium in bone defect restoration.
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Optics
Farzad Firouzi, Sayed Khatiboleslam Sadrnezhaad
Summary: Due to the various sample preparation techniques and optical measurement strategies, there are different experimental datasets available for the complex dielectric function of gold. Evaluating and selecting the most reliable datasets is crucial for optical-based designs and applications. The Brendel-Bormann model, known for its accuracy, is used as a criterion, with MS Excel being employed for its calculation. 'Palik' and 'Babar' are found to have the most accurate datasets for the real part of the dielectric function in the short- and long-wavelength ranges, respectively, while the reverse is true for the imaginary part. The validity of these datasets is attributed to using gold samples with minimal structural and surface imperfections.
JOURNAL OF MODERN OPTICS
(2023)
Article
Green & Sustainable Science & Technology
P. Vahdatkhah, O. Voznyy, S. K. Sadrnezhaad
Summary: The reversibility of anionic and cationic redox in Co-free concentration-gradient LLO was improved by integrating oxygen vacancies and high Ni/Mn ratio on LLO's surface, resulting in enhanced capacity of the cathode. This work provided a practical approach for resolving the capacity decay of Co-free LLOs by engineering the cathode/electrolyte interface and structure.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Asadollahi, Reza Alizadeh, Sayed Khatiboleslam Sadrnezhaad
Summary: In this study, the effects of adding silver and copper antibacterial elements on the microstructure, mechanical properties, and degradation behavior of as-cast Mg-2Zn alloy were investigated. The results showed that both silver and copper had significant grain refinement effects and formed different precipitates in the alloy. The addition of silver and copper also improved the ultimate shear strength values, but increased the hydrogen evolution rate. Solution treatment effectively reduced the degradation rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Amirmostafa Amirjani, S. K. Sadrnezhaad
Summary: Plasmonic nanostructures are widely used and their performance can be optimized by adjusting geometric parameters. This review revisits numerical methods for simulating optical responses and discusses the latest applications in various fields.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Shervin Daneshvar E. Asl, Hamaneh Zarenezhad, Masoud Askari, Mohammad Halali, Sayed Khatiboleslam Sadrnezhaad
Article
Engineering, Multidisciplinary
A. A. Shehab, S. K. Sadrnezhaad, A. K. Mahmoud, M. J. Torkamany, A. H. Kokabi, M. Fakouri Hasanabadi
