Article
Chemistry, Physical
Daishi Shiojiri, Tsutomu Iida, Hiroki Kakio, Masato Yamaguchi, Naomi Hirayama, Yoji Imai
Summary: Thermoelectric power generation using Mg2Si, doped with Sb and C, can enhance thermoelectric performance and effectively utilize waste heat energy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Daishi Shiojiri, Tsutomu Iida, Hiroto Hamba, Takuya Kodama, Masato Yamaguchi, Naomi Hirayama, Yoji Imai
Summary: By optimizing carrier concentration and reducing thermal conductivity, we improved the thermoelectric performance of Mg2Si through the co-doping of antimony (Sb) and zinc (Zn). Experimental results showed that co-doping Sb and Zn increased the electrical conductivity of Mg2Si without significantly affecting its thermal conductivity, resulting in an improved dimensionless figure of merit.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
I. Gordeev, L. Kolotova, S. Starikov
Summary: The mechanism of crystallization of Al-Si alloy from an amorphous state is still unclear. This study investigates the properties of aluminum silicide Al2Si structure and reveals the existence of several crystal structures with similar geometry and low formation energies. The chemical ordering in these structures is similar to that in Si-Al melt.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Nico Alexander Gaida, Ken Niwa, Takuya Sasaki, Masashi Hasegawa
Summary: In the study of narrow bandgap magnesium silicide semiconductors, extreme pressures and non-ambient temperatures were found to be fruitful for studying structural behavior and discovering new phases. Using synchrotron x-ray diffraction techniques at high pressure and temperature, structural changes and thermoelastic characteristics of magnesium silicides were investigated. The results provide valuable insights into the thermal stability and potential applications of these materials.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Vaishali Sushil Poddar
Summary: In this research, a beta-FeSi2-based thermoelectric module is used to extract waste heat energy from hot metallurgical products like hot rolled slabs. The maximum power output obtained is 0.91 W at 1250 K, with a power density of around 12.64 mWcm(-2). Three-dimensional views of various outputs are represented using ANSYS19.2 software, and mathematical relations are used to estimate potential circuit configurations to increase power output.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Xavier Mettan, Edoardo Martino, Lidia Rossi, Jacim Jacimovic, Juraj Krsnik, Osor S. Barisic, Norbert Babcsan, Sandor Beke, Rajmund Mokso, George Kaptay, Laszlo Forro
Summary: Shaping metals into foam can modulate their physical properties, making them attractive for applications where lightweight, low thermal conductivity, and acoustic isolation are desired. Adjusting the size of bubbles in the foam is crucial for targeted applications. The study shows promising potential for the application of metal foams in thermoelectric materials.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Rachid Zirmi, Belkacem Zouak, Federico Panciera, Marie Christine Record, Hakim Achour
Summary: This study follows the formation sequences of different manganese silicides through annealing process at different temperatures, obtaining Mn15Si26 at high temperatures. Techniques such as in situ X-ray diffraction and atomic force microscopy were used to analyze the silicides on silicon substrates.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ziyu Zhao, Ali Reza Kamali
Summary: This study proposes a new acid treatment method for converting magnesium silicide into hydrogen-terminated mesoporous silicon nanostructured material, and investigates its performance in photocatalytic degradation of methyl orange. The results show that M-pSi exhibits outstanding photocatalytic ability under acidic conditions, outperforming commercially available Si nanoparticles.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Engineering, Environmental
Baoping Zhang, Qinfen Gu, Hongyu Zhang, Xuebin Yu
Summary: Intermetallic Mg2Si nanocrystals encapsulated by graphene have been designed for advanced lithium storage, showing enhanced lithium storage performance with rapid Li-ions migration along exposed facets and reversible solid solution behavior. The resulting electrode demonstrates high capacity, outstanding rate capability, and longterm cycle stability, presenting a new perspective for the development of Mg2Si materials for lithium storage.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Cancan Bian, Rusheng Fu, Zhepu Shi, Jingjing Ji, Jun Zhang, Wen Chen, Xufeng Zhou, Siqi Shi, Zhaoping Liu
Summary: This study reports an economical and convenient method to increase the initial Coulombic efficiency (ICE) of silicon monoxide (SiO) anode material and successfully synthesizes a reaction product (MSO) with a core-shell structure. The MSO exhibits superior ICE, reversible capacity, and improved cyclic stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
B. Rabiu, B. Huang, W. A. Shah, X. Luo, Y. Q. Yang
Summary: Mg2.18(Si0.3Ge0.1Sn0.6)1-yXy (X = Bi, Sb; y = 0, 0.02, 0.06) quaternary solid solutions were synthesized and their thermoelectric properties were investigated. The results showed that Bi and Sb doping can effectively achieve n-type doping and improve the thermoelectric properties of the material, with the sample doped with Sb0.02 exhibiting the highest figure of merit ZT of 1.28.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Jian Wang, Asuka Miura, Rajkumar Modak, Yukiko K. Takahashi, Ken-ichi Uchida
Summary: The study demonstrates a thermoelectric generation method based on the anomalous Nernst effect, which is significantly enhanced in terms of thermoelectric output and structure by combining with magneto-optical recording technique. This research will help simplify device structures and promote effective utilization in thermoelectric applications.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Mohammad Yasseri, Kunal Mitra, Aryan Sankhla, Johannes de Boor, Eckhard Mueller
Summary: The study investigated the phase evolution and stability of Mg2(Si,Sn) thermoelectric materials, showing that the amount and rate of Mg loss have a significant impact on the demixing behavior of magnesium silicide stannide. By controlling the Mg vapor pressure, the stability of Mg2Si0.5Sn0.5 can be improved at lower temperatures.
Article
Engineering, Electrical & Electronic
Kunchit Singsoog, Athorn Vora-ud, Anek Charoenphakdee, Tosawat Seetawan
Summary: In this study, Ag/Bi codoped Mg2Si/MgO thermoelectric materials were successfully synthesized by ball milling and hot pressing. The Ag/Bi codoping was found to effectively reduce the electrical resistivity and enhance the power factor, with the codoped sample showing a significantly higher power factor than the undoped sample at room temperature.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Azam Rasouli, Maria Tsoutsouva, Jafar Safarian, Gabriella Tranell
Summary: This study investigated the kinetics of natural quartz reduction by Mg to produce Si or Mg2Si. The results showed that the reaction rate and product distribution were greatly influenced by the reaction temperature and the ratio of Mg to SiO2.
Article
Nanoscience & Nanotechnology
Jose F. Serrano-Claumarchirant, Bejan Hamawandi, Adem B. Ergul, Andres Cantarero, Clara M. Gomez, Pankaj Priyadarshi, Neophytos Neophytou, Muhammet S. Toprak
Summary: This study focuses on the development of large-area thermoelectric films using hybrid materials. By blending TE materials with polymers and using a specific solvent, durable polymer, and additive in the ink formulation, the researchers successfully fabricated large-area homogeneous hybrid TE films with improved conductivity and TE power factor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Y. Slimani, M. A. Almessiere, A. Demir Korkmaz, A. Baykal, A. Manikandan, H. Gungunes, M. S. Toprak
Summary: This study focused on the impact of Ga-Gd co-substitution on the structural, magnetic features and hyperfine interactions of nanosized NiCuZn spinel ferrites. The results showed that the substitution of Ga and Gd influenced the crystallite and particle sizes, as well as the cation distribution, of the spinel ferrites. Magnetometry measurements revealed changes in coercivity and saturation magnetization with the substitution of Ga and Gd. Superparamagnetic-to-ferromagnetic transition was observed below the blocking temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Z. Lalegani, S. A. Seyyed Ebrahimi, B. Hamawandi, L. La Spada, H. Batili, M. S. Toprak
Summary: An epsilon-negative metamaterial (ENM) with core@shell nanoparticles was designed. The optimal performance was achieved by growing a 10 nm SiO2 shell on 54 nm Ag nanoparticles.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Stefano Fasolin, Simona Barison, Filippo Agresti, Simone Battiston, Stefania Fiameni, Jacopo Isopi, Lidia Armelao
Summary: New membranes based on ZrVTi and ZrVTiPd alloys were tested for hydrogen purification/separation. The results showed that partial substitution of palladium can decrease the environmental impacts of the membranes.
Article
Chemistry, Physical
Hazal Batili, Bejan Hamawandi, Adem Bjorn Ergul, Muhammet Sadaka Toprak
Summary: This study aimed to assemble thermoelectric films with pre-defined morphology and surface chemistry on non-conductive substrates using electrophoretic deposition (EPD). Bi2Te3 nanoparticles were synthesized and used for the deposition of thermoelectric films on glass substrates. The addition of a molecular linker helped reduce resistance and improve the performance of the films. The measured Seebeck coefficient and power factor indicated the potential application of this technology to large area thermoelectric films.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Huseyin Tombuloglu, Yassine Slimani, Sultan Akhtar, Moneerah Alsaeed, Guzin Tombuloglu, Munirah A. Almessiere, Muhammet S. Toprak, Huseyin Sozeri, Abdulhadi Baykal, Ismail Ercan
Summary: This study investigated the translocation of four different sizes of iron oxide nanoparticles in pumpkins. Only the 30-50 nm nanoparticles were significantly translocated to the leaves, showing size-dependent translocation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Giovanni Marco Saladino, Carmen Vogt, Bertha Brodin, Kian Shaker, Nuzhet Inci Kilic, Kenth Andersson, Marie Arsenian-Henriksson, Muhammet Sadaka Toprak, Hans Martin Hertz
Summary: In this study, hybrid ruthenium-decorated superparamagnetic iron oxide nanoparticles were designed as contrast agents for both magnetic resonance imaging (MRI) and X-ray fluorescence computed tomography (XFCT). These nanoparticles were synthesized through a one-pot polyol hot injection method. In vivo preclinical studies showed the possibility of correlative bioimaging using these contrast agents. The complementary nature of MRI and XFCT allowed for accurate localization and high specificity and resolution in nanoparticle detection, suggesting potential applications for early tumor diagnosis, improved long-term treatment monitoring, and enhanced radiotherapy planning.
Article
Nanoscience & Nanotechnology
Stefano Boldrini, Alberto Ferrario, Stefano Fasolin, Alvise Miozzo, Simona Barison
Summary: Ultrafast high-temperature sintering (UHS) is a technique capable of synthesizing and sintering dense materials within seconds. This study presents a simple route to sinter Mg2Si pressed powders by UHS, which allowed for the production of dense samples with a total thermal history below 1 minute. The efficacy of the high process rate in preventing grain growth and avoiding significant Mg evaporation was demonstrated.
Article
Crystallography
Peter Bury, Marek Vevericik, Frantisek Cernobila, Natalia Tomasovicova, Milan Timko, Peter Kopcansky, Filippo Agresti, Simona Barison
Summary: A composite ferronematic system based on the nematic liquid crystal E7, doped with goethite magnetic nanoparticles, was investigated. The influence of magnetic nanoparticles on structural changes of ferronematic liquid crystals was studied using surface acoustic waves and the magneto-optical effect. The experimental results confirmed the decrease in threshold field and increase in transition temperature with increasing volume fraction of nanoparticles. The effect of nanoparticles' concentration on both total structural changes and magneto-optical behavior was also observed.
Article
Chemistry, Multidisciplinary
Giovanni Marco Saladino, Ronak Kakadiya, Shaquib Rahman Ansari, Alexandra Teleki, Muhammet Sadaka Toprak
Summary: Superparamagnetic iron oxide nanoparticles (SPIONs) play a dominant role in various biomedical applications, including magnetic separation, drug delivery, diagnostics, and hyperthermia treatments. In this study, superparamagnetic nanoclusters (SP-NCs) with high unit magnetization and diameters up to 400 nm were synthesized using conventional or microwave-assisted solvothermal methods. The choice of synthesis route and capping agent significantly influenced the particle size, SP-NC size, surface chemistry, and magnetic properties. The SP-NCs were then coated with a silica shell doped with a fluorophore to provide fluorescence properties and high stability. The heating efficiency studies demonstrated the potential of these synthesized SP-NCs in hyperthermia treatment. The enhanced magnetically-active content, fluorescence, magnetic property, and heating efficiency of SP-NCs offer promising opportunities for biomedical applications.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Filippo Agresti, David Cabaleiro, Laura Fedele, Stefano Rossi, Simona Barison
Summary: PCM emulsions or micro-nano-encapsulated into organic and inorganic shells have been studied to enhance the thermal capacity and efficiency of heat transfer liquids. In this work, RT21HC, a commercial PCM, was successfully nano-encapsulated into PMMA shells to obtain stable colloidal dispersions. The colloidal dispersions were characterized for microstructure, colloidal stability, rheological properties, heat capacity, and thermal diffusivity. The effect of incorporating nucleating agents into the nano-capsules to mitigate PCM crystallization supercooling was also investigated.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Nanoscience & Nanotechnology
Eleonora Ascrizzi, Silvia Casassa, Loredana Edith Daga, Atreyi Dasmahapatra, Lorenzo Maschio, Antti J. Karttunen, Stefano Boldrini, Alberto Ferrario, Carlo Fanciulli, Francesco Aversano, Marcello Baricco, Alberto Castellero
Summary: The influence of defects on the thermoelectric properties of TiNi1+x Sn alloys was investigated through experiments and density functional theory calculations. It was found that both interstitial Ni defects and composition conserving defects narrow the band gap, promoting metallic behavior and leading to an increase in electrical conductivity and a decrease in the absolute values of the Seebeck coefficient.
Article
Nanoscience & Nanotechnology
Cristina Artini, Giovanni Pennelli, Patrizio Graziosi, Zhen Li, Neophytos Neophytou, Claudio Melis, Luciano Colombo, Eleonora Isotta, Ketan Lohani, Paolo Scardi, Alberto Castellero, Marcello Baricco, Mauro Palumbo, Silvia Casassa, Lorenzo Maschio, Marcella Pani, Giovanna Latronico, Paolo Mele, Francesca Di Benedetto, Gaetano Contento, Maria Federica De Riccardis, Raffaele Fucci, Barbara Palazzo, Antonella Rizzo, Valeria Demontis, Domenic Prete, Muhammad Isram, Francesco Rossella, Alberto Ferrario, Alvise Miozzo, Stefano Boldrini, Elisabetta Dimaggio, Marcello Franzini, Simone Galliano, Claudia Barolo, Saeed Mardi, Andrea Reale, Bruno Lorenzi, Dario Narducci, Vanira Trifiletti, Silvia Milita, Alessandro Bellucci, Daniele M. Trucchi
Summary: The increasing energy demand and the pressing need for clean energy conversion technologies are a significant global issue. Thermoelectricity, which converts waste heat into electricity, has potential but suffers from low efficiency. Researchers are making efforts to better understand the fundamental issues and develop more efficient thermoelectric devices.
Article
Chemistry, Multidisciplinary
Anna Luisa Costa, Magda Blosi, Andrea Brigliadori, Ilaria Zanoni, Simona Ortelli, Felice Carlo Simeone, Serena Delbue, Sarah D'Alessandro, Silvia Parapini, Claudia Vineis, Alessio Varesano, Muhammet S. Toprak, Bejan Hamawandi, Davide Gardini
Summary: This study explores the antiviral and antibacterial properties of quaternized hydroxyethyl cellulose-stabilized silver nanoparticles (Ag-HEC) in different environments. The results show the potential application of Ag-HEC in protective clothing and nasal masks, providing a broad-spectrum antimicrobial solution.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Physics, Fluids & Plasmas
David Cabaleiro, Sonia Losada-Barreiro, Filippo Agresti, Carolina Hermida-Merino, Laura Fedele, Luis Lugo, Simona Barison, Manuel M. Pineiro
Summary: This study focuses on preparing and characterizing phase change material nanoemulsions as thermal fluids with latent functionality. The results show that the formulated nanoemulsions have good stability and thermal reliability, effectively reducing subcooling and enhancing energy storage capacity.