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Articoli di riviste sul tema "Metal doping"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Wang, Ting, Yan Dong Mao, Fang Peng Tang, Jun Xing, and Li Guang Wu. "Crystallization and Photocatalytic-Activity of TiO₂ Doped with Metal Ions Prepared by Adsorption Phase Synthesis." Advanced Materials Research 624 (December 2012): 194–99. http://dx.doi.org/10.4028/www.scientific.net/amr.624.194.

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TiO2 photocatalysts doped with different metal ions were prepared by adsorption phase synthesis. The influence of different dopant metal ions with various concentrations on the crystallization of TiO2 was ex-plored by XRD. Then photodegradation experiments of methyl-orange were employed to evaluate the activity of these photocatalysts. The results indicated that the crystallization of TiO2 was restricted after doping, due to replacement of Ti4+ in TiO2 lattice structure by other metal ions. And the restriction became stronger with radius and concentration of doping ions increasing. There was a

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2

Hua, L., and L. Zhang. "Effect of In, Bi, Zn Binary-Metal Dopings in Sn-0.7Cu Solder on its Electrochemical Corrosion Charateristics in 3 wt.% NaCl Solution." Advanced Materials Research 548 (July 2012): 286–92. http://dx.doi.org/10.4028/www.scientific.net/amr.548.286.

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Effect of In, Zn, Bi binary-metal dopings in Sn-0.7Cu (SC) solder on the electrochemical corrosion characteristics of SC solder were conducted, the potentiodynamic polarization test coupled with SEM analyses had been widely used to study the corrosion properties of alloy materials. The results showed that when both In-Zn binary-metal doping was increased, the corrosive current density (Icorr) increased, which proved that anti-corrosion capacities of Sn-0.7Cu solder decreased with In-Zn doping increasing, the affected order was Zn>In. When both In-Bi binary-metal doping percent were increase

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3

Zhang, Siyuan, Hsun Jen Chuang, Son T. Le, et al. "Control of the Schottky barrier height in monolayer WS₂ FETs using molecular doping." AIP Advances 12, no. 8 (2022): 085222. http://dx.doi.org/10.1063/5.0101033.

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Developing controllable doping processes for two-dimensional (2D) semiconductors is critical to developing next-generation electronic and optoelectronic devices. Understanding the nature of the contacts is an essential step in realizing efficient charge injection in transition metal dichalcogenides. In this study, post-growth n-doping of chemical vapor deposition grown monolayer (1 L) WS2 is achieved through molecular reductant solution treatment. The doping level can be effectively controlled by the treatment time and dopant solution concentrations. The doped WS2 field-effect transistors show

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4

Rojanasuwan, Sunit, Pakorn Prajuabwan, Annop Chanhom, Anuchit Jaruvanawat, Adirek Rangkasikorn, and Jiti Nukeaw. "The Effect of the Central Metal Atom on the Structural Phase Transition of Indium Doped Metal Phthalocyanine." Advanced Materials Research 717 (July 2013): 146–52. http://dx.doi.org/10.4028/www.scientific.net/amr.717.146.

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We investigate the effect of central metal atom on the phthalocyanine (Pc) molecular crystals as intercalated with indium. As dopant, indium has physical interaction with some atom in the ring of Pc molecule and there is charge transfer between indium atom and Pc ring atom. Since In-doped Pc is a hole doping which increase positive charge carriers and the HOMO of ZnPc, CuPc, NiPc and MgPc are localized on the phthalocyanine ring, then, the central metal atom e.g. Zn, Cu, Ni and Mg are not directly involved with the charge transfer between indium dopant and their Pc molecule. The structural pha

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5

Carey, J. J., and M. Nolan. "Cation doping size effect for methane activation on alkaline earth metal doping of the CeO2 (111) surface." Catalysis Science & Technology 6, no. 10 (2016): 3544–58. http://dx.doi.org/10.1039/c5cy01787d.

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6

Periyat, Pradeepan, Binu Naufal, and Sanjay Gopal Ullattil. "A Review on High Temperature Stable Anatase TiO₂ Photocatalysts." Materials Science Forum 855 (May 2016): 78–93. http://dx.doi.org/10.4028/www.scientific.net/msf.855.78.

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This review focuses on the recent developments of high temperature stable anatase TiO2 photocatalyst. Eventhough TiO2 exists in different forms anatase, rutile and brookite, anatase phase stabilization is often the key to obtain the highest photocatalytic performance for TiO2, particularly for the use as an antibacterial and self-cleaning coatings in high temperature processed ceramics. Different methods available for the anatase stabilization in literature are critically reviewed and emphasis is placed on relatively recent developments. Currently available methods of anatase stabilizations ar

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7

Mogal, Sajid I., Manish Mishra, Vimal G. Gandhi, and Rajesh J. Tayade. "Metal Doped Titanium Dioxide: Synthesis and Effect of Metal Ions on Physico-Chemical and Photocatalytic Properties." Materials Science Forum 734 (December 2012): 364–78. http://dx.doi.org/10.4028/www.scientific.net/msf.734.364.

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Titanium dioxide (Titania; TiO2) is one of the most widely used metal oxide semiconductor in the field of photocatalysis for removal of pollutants. It has been noted that titanium dioxide is a research friendly material as its physico-chemical and catalytic properties can be easily altered as per specific application. Since many years, researchers have tried to modify the properties of titanium dioxide by means of doping with metals and non-metals to improve its performance for photocatalytic degradation (PCD) applications. The doping of various metal ions like Ag, Ni, Co, Au, Cu, V, Ru, Fe, L

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8

Li, Bin, Yihan Zhang, Yang Liu, et al. "Highly Efficient Contact Doping for High-Performance Organic UV-Sensitive Phototransistors." Crystals 12, no. 5 (2022): 651. http://dx.doi.org/10.3390/cryst12050651.

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Organic ultraviolet (UV) phototransistors are promising for diverse applications. However, wide-bandgap organic semiconductors (OSCs) with intense UV absorption tend to exhibit large contact resistance (Rc) because of an energy-level mismatch with metal electrodes. Herein, we discovered that the molecular dopant of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) was more efficient than the transition metal oxide dopant of MoO3 in doping a wide-bandgap OSC, although the former showed smaller electron affinity (EA). By efficient contact doping, a low Rc of 889 Ω·cm and a high mobil

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9

Han, Juan, Xu Wu, Julia Xiaojun Zhao, and David T. Pierce. "An Unprecedented Metal Distribution in Silica Nanoparticles Determined by Single-Particle Inductively Coupled Plasma Mass Spectrometry." Nanomaterials 14, no. 7 (2024): 637. http://dx.doi.org/10.3390/nano14070637.

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Metal-containing nanoparticles are now common in applications ranging from catalysts to biomarkers. However, little research has focused on per-particle metal content in multicomponent nanoparticles. In this work, we used single-particle inductively coupled plasma mass spectrometry (ICP-MS) to determine the per-particle metal content of silica nanoparticles doped with tris(2,2′-bipyridyl)ruthenium(II). Monodispersed silica nanoparticles with varied Ru doping levels were prepared using a water-in-oil microemulsion method. These nanoparticles were characterized using common bulk-sample methods s

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10

Dzhumanov, S. "METAL-INSULATOR TRANSITIONS IN DOPED La-BASED SUPER CONDUCTORS WITH SMALL-RADIUS DOPANTS." Eurasian Physical Technical Journal 19, no. 1 (39) (2022): 15–19. http://dx.doi.org/10.31489/2022no1/15-19.

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n this work, we study the possibility of realizing two distinct mechanisms of metal-insulator transitions in hole-doped cuprates induced by the localization of charge carriers near the small-radius impurities and in a deformable lattice (i.e. in the absence of impurities). The purpose of this research is to determine the criteria (i.e. conditions) for the existence of the localized states of hole carriers and solve the problem of metal-insulator transitions in La-based cuprates. The advantage of La-based cuprate versus other types of cuprates is that two distinct metal-insulator transitions in

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11

Michalsky, Ronald, Peter H. Pfromm, and Aldo Steinfeld. "Rational design of metal nitride redox materials for solar-driven ammonia synthesis." Interface Focus 5, no. 3 (2015): 20140084. http://dx.doi.org/10.1098/rsfs.2014.0084.

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Fixed nitrogen is an essential chemical building block for plant and animal protein, which makes ammonia (NH 3 ) a central component of synthetic fertilizer for the global production of food and biofuels. A global project on artificial photosynthesis may foster the development of production technologies for renewable NH 3 fertilizer, hydrogen carrier and combustion fuel. This article presents an alternative path for the production of NH 3 from nitrogen, water and solar energy. The process is based on a thermochemical redox cycle driven by concentrated solar process heat at 700–1200°C that yiel

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12

Tan, Changlong, Dianshuang Xu, Kun Zhang, Xiaohua Tian, and Wei Cai. "Electronic and Magnetic Properties of Rare-Earth Metals Doped ZnO Monolayer." Journal of Nanomaterials 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/329570.

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The structural, electronic, and magnetic properties of rare-earth metals doped ZnO monolayer have been investigated using the first-principles calculations. The induced spin polarization is confirmed for Ce, Eu, Gd, and Dy dopings while the induced spin polarization is negligible for Y doping. The localizedfstates of rare-earth atoms respond to the introduction of a magnetic moment. ZnO monolayer undergoes transition from semiconductor to metal in the presence of Y, Ce, Gd, and Dy doping. More interestingly, Eu doped ZnO monolayer exhibits half-metallic behavior. Our result demonstrates that t

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13

Zhang, Pei Lin, Shu Yin, and Tsugio Sato. "Co-Doping Effect of Metal Ion on the Visible Light Responsive Photocatalytic Properties of Nitrogen Doped Titanium Dioxide." Advances in Science and Technology 63 (October 2010): 36–40. http://dx.doi.org/10.4028/www.scientific.net/ast.63.36.

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Different valences of metal ions such as Fe3+ and Nb5+ were co-doped with nitrogen ion into titanium dioxide by hydrothermal method using metal chlorides and hexamethylenetetramine as the sources of metal ions and nitrogen ion, respectively. The co-doping of low-content metal ion showed no noticeable influence on the crystalline phases and specific surface area (S.S.A.) of the samples. Doping with Fe ion could significantly enhance the absorption in visible light region, but doping with Nb ion showed almost no effect. The photocatalytic activities of the samples were determined for the oxidati

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14

Maswanganye, Mpho W., Guy L. Kabongo, and Mokhotjwa S. Dhlamini. "Modulating Charge Mobility in Microwave Synthesized Ti-doped ZnS Nanoparticles for Potential Photoanode Applications." Nanomaterials 13, no. 1 (2022): 77. http://dx.doi.org/10.3390/nano13010077.

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Doping ZnS nanoparticles with different metal and/or non-metal ions is one of the ways to improve their properties. That is because dopants introduce strain into the lattice of the ZnS nanoparticles. The influence of Ti on the ZnS nanoparticles was investigated on the structural properties, optical properties, and also electrical impedance spectroscopy (EIS). The presence of Ti in the crystal lattice of the ZnS introduced strain into the crystal structure, hence causing a lattice expansion and reducing the crystallite sizes of the ZnS nanoparticles. Ti doping was observed to increase the energ

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15

Continenza, Alessandra, Gianni Profeta, and Silvia Picozzi. "Transition metal doping in Ge." Journal of Magnetism and Magnetic Materials 310, no. 2 (2007): 2147–49. http://dx.doi.org/10.1016/j.jmmm.2006.10.940.

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16

Lanzani, G., T. Kangas, and K. Laasonen. "Copper passivation by metal doping." Journal of Alloys and Compounds 482, no. 1-2 (2009): 33–42. http://dx.doi.org/10.1016/j.jallcom.2009.03.180.

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17

Girlani, S. A., B. Yan, and P. C. Taylor. "Doping in metal chalcogenide glasses." Semiconductors 32, no. 8 (1998): 879–83. http://dx.doi.org/10.1134/1.1187476.

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18

Zhang, Xiayan, Xiaoyan Li, Yanli Zeng, Shijun Zheng та Lingpeng Meng. "Enhancing σ/π-type copper(i)⋯thiophene interactions by metal doping (metal = Li, Na, K, Ca, Sc)". Dalton Transactions 44, № 3 (2015): 1283–91. http://dx.doi.org/10.1039/c4dt02286f.

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Metal atom doping on thiophene can enhance the Cu⋯thiophene interactions. Enhancement factors are determined by electrostatic potentials of the molecular surface and the electronic configuration of the doping metal.

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19

Tavkhelidze, Avtandil, Larissa Jangidze, Zaza Taliashvili, and Nima E. Gorji. "G-Doping-Based Metal-Semiconductor Junction." Coatings 11, no. 8 (2021): 945. http://dx.doi.org/10.3390/coatings11080945.

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Geometry-induced doping (G-doping) has been realized in semiconductors nanograting layers. G-doping-based p-p(v) junction has been fabricated and demonstrated with extremely low forward voltage and reduced reverse current. The formation mechanism of p-p(v) junction has been proposed. To obtain G-doping, the surfaces of p-type and p+-type silicon substrates were patterned with nanograting indents of depth d = 30 nm. The Ti/Ag contacts were deposited on top of G-doped layers to form metal-semiconductor junctions. The two-probe method has been used to record the I–V characteristics and the four-p

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20

Tammarugwattana, Narin, Kitipong Mano, Chaloempol Saributr, et al. "Growth and Characterizations of Tin-Doped on Nickel-Phthalocyanine as a Novel Nanomaterial." Advanced Materials Research 1131 (December 2015): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amr.1131.39.

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Tin-doped nickel phthalocyanine thin films (Sn-doped NiPc) were deposited by thermal co-evaporation method. Doping concentration of tin in NiPc was controlled via different deposition rates between metal dopent and host organic material. Properties of the thin films doped by tin in the range of 3 to 15% were characterized by atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), UV-Visible spectroscopy and X-ray photoelectron spectroscopy (XPS). Furthermore, electrical properties of Al/Sn-doped-NiPc/ITO devices i.e. charge carrier concentration and carrier mobility

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21

Rudakova, A. V., and K. M. Bulanin. "Photoinduced Superhydrophilicity of Titanium Dioxide: Effect of Heterovalent Metal Doping." Kolloidnyj žurnal 86, no. 5 (2024): 640–54. https://doi.org/10.31857/s0023291224050109.

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The self-cleaning effect of titanium dioxide coatings is based on the photocatalytic oxidizing ability and the effect of photoinduced superhydrophilicity. Metal doping is used to enhance photocatalytic activity, while its effect on surface hydrophilicity is practically not studied. In this work, the influence of heterovalent doping of anatase titanium dioxide on its hydrophilic properties was investigated in detail. Thin films x-M-TiO2, where M – Nb5+, Sc3+, Al3+, with dopant concentration in the range of 0.0–1.0 at. %, were obtained on glass substrates from solutions of the corresponding sols

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22

Yu, Rundong. "The relationship between the fabrication and characteristics of nitrogen-doped graphene." Journal of Physics: Conference Series 2608, no. 1 (2023): 012027. http://dx.doi.org/10.1088/1742-6596/2608/1/012027.

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Abstract Since the 21st century, with the popularization of computers and mobile phones to the upgrading of various kinds of electronic products, human needs are also changing, among which the flexible touch screen has received wide attention. To achieve a wide application of flexible touch screens, this paper needs to make more materials innovations, and graphene’s unique and excellent performance has attracted wide attention. Among them, the metal doping, non-metallic doping, metallic and non-metallic co-doping of graphite phase carbon nitride has broad development prospects, widely used, or

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23

CHEN, YU, CHUNWANG ZHAO, YUQIN GUAN, and ZHENDUO ZHANG. "CURIE TEMPERATURE OF 3d TRANSITION-METAL-DOPED GaAs." Modern Physics Letters B 26, no. 18 (2012): 1250116. http://dx.doi.org/10.1142/s0217984912501163.

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The Zener model of ferromagnetism predicts that higher values of Curie temperature (CT) can be achieved by materials containing greater doping concentrations and hole concentrations. However, the prediction value is significantly higher than those from experiments with high doping concentrations. This discrepancy is resolved by an improved theoretical prediction for CT of 3d transition-metal-doped GaAs . Cr -doping results in higher CT than the Mn -doped GaAs. Maximum CT of Ga 1-x Mn x As is 215 K with 13.9% doping concentration. Room temperature CT can be achieved by 11.3% Cr -doped GaAs . Ma

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24

Dzujah, Diyan Unmu, Abdul-Muizz Pradipto, Rahmat Hidayat, and Kohji Nakamura. "Modification of plasmonic properties in several transition metal-doped graphene studied by the first principles method." RSC Advances 13, no. 2 (2023): 1446–54. http://dx.doi.org/10.1039/d2ra06446d.

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Doping graphene with a single transition metal atom results in bandgap opening and partial filling of the mid-gap states, leading to the possibility of plasmon excitation with plasmon frequency depending on the TM dopant.

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25

Whang, Chin Myung, J. G. Kim, and Hae Jin Hwang. "Photocatalytic Properties of the Transition Metal Doped TiO₂ Powder Prepared by Sol-Gel Process." Key Engineering Materials 280-283 (February 2007): 647–50. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.647.

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Transition metal-doped TiO2 powders as a photocatalyst were prepared by sol-gel process and Sb, Bi and Nb were introduced into them as dopants. The photocatalytic behaviors of the doped TiO2 powder were studied as a function of dopant, doping concentration and preparation conditions. X-ray diffraction, FT-Raman, B.E.T. and scanning electron microscopy were applied for structural and microstructural studies. Optical properties of the doped TiO2 powders were studied by UV-Visible Spectrometer and photocatalytic activity of the doped TiO2 was characterized in terms of the degradation of 1,4-dichl

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26

Gidado, Abdulkadir S., Reuben A. Solomon, Lawal Abubakar, Fa'iza Ahmed, and Sulaiman R. Haladu. "First Principle Investigations of Structural, Electronic and Thermal Properties of Pristine, Metal and Non-Metal Doped Silicene for Thermoelectric Applications." Physics Access 04, no. 02 (2024): 85–94. http://dx.doi.org/10.47514/phyaccess.2024.4.2.010.

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Silicene, a two-dimensional hexagonal silicon layer, exhibits exceptional electronic and thermoelectric properties. However, its application in semiconductors is hindered by its zeroband gap, which could be overcome by modifying its electronic properties through doping. In this paper, Density Functional Theory (DFT) calculations were performed to investigate the band gap opening in silicene by studying the effect of magnesium and sulphur doping on its electronic, structural and thermal properties. Pristine silicene has a lattice constant of 3.86 Å and a zero-band gap. Upon doping with 12.5% S

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27

Jiang, Haiyan, Yang Li, Daohan Wang, Xiaodong Hong, and Bing Liang. "Recent Advances in Heteroatom Doped Graphitic Carbon Nitride (g-C3N4) and g-C3N4/Metal Oxide Composite Photocatalysts." Current Organic Chemistry 24, no. 6 (2020): 673–93. http://dx.doi.org/10.2174/1385272824666200309151648.

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Industrial wastewater contains abundant organic dyes, antibiotics, pesticides, chemical fertilizers or heavy metal ions, which seriously deteriorate the ecological environment. Among the practical techniques for reducing water pollution, photocatalysis is a kind of sustainable solar energy conversion technique for removing organic contaminants. In this review, the advances in the preparation, modification, and doping of graphitic carbon nitride (g-C3N4), including non-metal doping, metal doping, dual- or tri-doping, are introduced firstly. Then, we systematically reviewed the recent progress o

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Pelc, D., P. Popčević, M. Požek, M. Greven, and N. Barišić. "Unusual behavior of cuprates explained by heterogeneous charge localization." Science Advances 5, no. 1 (2019): eaau4538. http://dx.doi.org/10.1126/sciadv.aau4538.

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The discovery of high-temperature superconductivity in cuprates ranks among the major scientific milestones of the past half century, yet pivotal questions regarding the complex phase diagram of these materials remain unanswered. Generally thought of as doped charge-transfer insulators, these complex oxides exhibit pseudogap, strange-metal, superconducting, and Fermi liquid behavior with increasing hole-dopant concentration. Motivated by recent experimental observations, here we introduce a phenomenological model wherein exactly one hole per planar copper-oxygen unit is delocalized with increa

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Yang, He, and S. Kudashev. "Design of Metal Sulfide Electrode for Hydrogen Production by Electrolysis." Bulletin of Science and Practice 10, no. 6 (2024): 284–95. http://dx.doi.org/10.33619/2414-2948/103/32.

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Hydrogen evolution reaction (HER) is the cathodic hydrogen evolution reaction in electrolytic cell, but the hydrogen evolution catalytic properties of electrode materials best remains is the precious metal catalyst, therefore, in order to study the catalytic performance is good, and cheap hydrogen evolution electrode materials has become the research hot spot, metal sulfide can be mixed and with good electrical conductivity is it can be used as a necessary condition for hydrogen evolution electrode, The core theory of this paper is the first principle. By taking metal sulfide as the matrix and

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Li, Jie, Yuchen Zhou, Kun Liu, Yifan Wang, Hui Li, and Artem Okulov. "Tunable Electronic Transport of New-Type 2D Iodine Materials Affected by the Doping of Metal Elements." Molecules 28, no. 20 (2023): 7159. http://dx.doi.org/10.3390/molecules28207159.

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2D iodine structures under high pressures are more attractive and valuable due to their special structures and excellent properties. Here, electronic transport properties of such 2D iodine structures are theoretically studied by considering the influence of the metal-element doping. In equilibrium, metal elements in Group 1 can enhance the conductance dramatically and show a better enhancement effect. Around the Fermi level, the transmission probability exceeds 1 and can be improved by the metal-element doping for all devices. In particular, the device density of states explains well the disti

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Ye, Ming Quan, Ai Jun Han, Zhu Bo Liu, and Chen Wang. "Metal Ions Doped Complex Cobalt Blue Pigment Research." Advanced Materials Research 415-417 (December 2011): 194–99. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.194.

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Metal ions doped complex cobalt blue pigments are prepared by homogeneous precipitation, to investigate the effects of doping ions Zn2+，Mg2+，Ni2+and Y3+on some properties of the doped complex cobalt blue pigments, such as crystal structure, color, shading power and temperature resistance. Studies have shown that doping have little effect on the spinel crystal type and temperature resistance of the pigments ; ionic radius differences between doping ions and Co2 +cause lattice distortion and changes of lattice constant , thus affecting the ligand state spaces of Co2 +ion, color and shading power

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Mohamed Islam, Noor Zalikha, Hendrik Kosslick, Mat Tamizi Zainuddin, et al. "Effect of Single and Bimetallic Ni, V and Mn Transition Metal Ion Doping on the Properties of Anatase/Brookite TiO₂ Photocatalyst." Advanced Materials Research 1133 (January 2016): 527–31. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.527.

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Titania with a mixture of anatase, rutile and brookite nanostructures have gained much attention lately due to their high photocatalytic activity. Pure titania (TiO2) with a mixture of anatase, rutile, brookite phase were synthesized by hydrothermal treatment using titanium isopropoxide (TTIP) and 1.0 M of urea. The titania were doped with 1wt% of single transition metal nickel (Ni), vanadium (V) and manganese (Mn) and 1 wt% bimetallic transition metal of Ni-V and Ni-Mn, respectively. Pure titania shows higher, 94 % degradation of ibuprofen (Ibp) as the presence of brookite phase in the struct

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Cheng, Rong, Jincheng Xia, Junying Wen, Pingping Xu, and Xiang Zheng. "Nano Metal-Containing Photocatalysts for the Removal of Volatile Organic Compounds: Doping, Performance, and Mechanisms." Nanomaterials 12, no. 8 (2022): 1335. http://dx.doi.org/10.3390/nano12081335.

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Volatile organic compounds (VOCs) in indoor air are considered a major threat to human health and environmental safety. The development of applicable technologies for the removal of VOCs is urgently needed. Nowadays, photocatalytic oxidation (PCO) based on metal-containing photocatalysts has been regarded as a promising method. However, unmodified photocatalysts are generally limited in applications because of the narrow light response range and high recombination rate of photo-generated carriers. As a result, nano metal-containing photocatalysts doped with elements or other materials have att

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Abubakar, Hassana, Hadiza Dawi, and Chinomso Odimba. "Effect of Mono Metal Doping of ZnWO4 Nanoparticles with Sodium, Magnesium and Titanium." Nile Journal of Engineering and Applied Science 2, no. 2 (2025): 1. https://doi.org/10.5455/njeas.193103.

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Sol-gel synthesized Zinc Tungstate Nanoparticles (ZnWO4) were subjected to metal doping using sodium, magnesium and titanium. This research involved the utilization of the wet impregnation method as well as variation of the concentration of each dopant ions at 1%, 3%, 5% and 7% respectively. The resulting nanocomposite materials were characterized using HRTEM, SAED and XRD spectroscopy, and according to the results obtained, regardless of the concentration, results obtained revealed the presence of bright spots and lattice fringes which clearly indicate relatively high crystallinity for the Na

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Turski, Henryk, Pawel Wolny, Mikolaj Chlipala, et al. "Role of Metallic Adlayer in Limiting Ge Incorporation into GaN." Materials 15, no. 17 (2022): 5929. http://dx.doi.org/10.3390/ma15175929.

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Atomically thin metal adlayers are used as surfactants in semiconductor crystal growth. The role of the adlayer in the incorporation of dopants in GaN is completely unexplored, probably because n-type doping of GaN with Si is relatively straightforward and can be scaled up with available Si atomic flux in a wide range of dopant concentrations. However, a surprisingly different behavior of the Ge dopant is observed, and the presence of atomically thin gallium or an indium layer dramatically affects Ge incorporation, hindering the fabrication of GaN:Ge structures with abrupt doping profiles. Her

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Burroughes, J. H., D. L. Rogers, G. Arjavalingam, G. D. Pettit, and M. S. Goorsky. "Doping-induced bandwidth enhancement in metal-semiconductor-metal photodetectors." IEEE Photonics Technology Letters 3, no. 7 (1991): 657–59. http://dx.doi.org/10.1109/68.87945.

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37

Rohloff, Martin, Björn Anke, Dennis Wiedemann, et al. "Synthesis and Doping Strategies to Improve the Photoelectrochemical Water Oxidation Activity of BiVO4 Photoanodes." Zeitschrift für Physikalische Chemie 234, no. 4 (2020): 655–82. http://dx.doi.org/10.1515/zpch-2019-1476.

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AbstractBiVO4 is one of the most investigated and most promising metal oxide based photoanode materials for photoelectrochemical (PEC) water oxidation. Although it has several advantages (suitable band gap around 2.4 eV, suitable valence-band position for water oxidation, low toxicity, high abundance), it suffers from slow charge-carrier transport properties, high surface recombination, and limited water-oxidation activity. In the present work, we review the synthesis and doping strategies that we developed in the last years to improve the PEC performance of BiVO4 photoanodes. Strategies rangi

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38

Chen, Jiajia, Kai Wu, Huanhuan Ma, Wei Hu, and Jinlong Yang. "Tunable Rashba spin splitting in Janus transition-metal dichalcogenide monolayers via charge doping." RSC Advances 10, no. 11 (2020): 6388–94. http://dx.doi.org/10.1039/d0ra00674b.

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Two-dimensional Janus transition-metal dichalcogenides possess an intrinsic Rashba effect, which can be manipulated by charge doping. Electron doping can effectively strengthen the Rashba effect, while hole doping would weaken it.

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39

Zhang, Luying, Qingzhe Zhang, Peng Jiang, Ying Liu, Chen Zhao та Yuhang Dong. "Effects of Alloying Element on Hydrogen Adsorption and Diffusion on α-Fe(110) Surfaces: First Principles Study". Metals 14, № 5 (2024): 487. http://dx.doi.org/10.3390/met14050487.

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Based on first principles density functional theory (DFT) methods, this study employed the Cambridge Serial Total Energy Package (CASTEP) module within Materials Studio (MS) software under the generalized gradient approximation to investigate the adsorption, diffusion behavior, and electronic properties of hydrogen atoms on α-Fe(110) and α-Fe(110)-Me (Mn, Cr, Ni, Mo) surfaces, including calculations of their adsorption energies and density of states (DOS). The results demonstrated that doping with alloy atoms Me increased the physical adsorption energy of H2 molecules on the surface. Specifica

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Ghosh, Atanu, Omar F. Mohammed, and Osman M. Bakr. "Atomic-Level Doping of Metal Clusters." Accounts of Chemical Research 51, no. 12 (2018): 3094–103. http://dx.doi.org/10.1021/acs.accounts.8b00412.

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41

Saucedo, E., L. Fornaro, N. V. Sochinskii, et al. "Heavy metal doping of CdTe crystals." IEEE Transactions on Nuclear Science 51, no. 6 (2004): 3105–10. http://dx.doi.org/10.1109/tns.2004.839076.

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42

Ma, Guoxin, Fei Wang, Rui Jin, et al. "Dual Doping in Precious Metal Oxides: Accelerating Acidic Oxygen Evolution Reaction." International Journal of Molecular Sciences 26, no. 4 (2025): 1582. https://doi.org/10.3390/ijms26041582.

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Developing a highly active and stable catalyst for acidic oxygen evolution reactions (OERs), the key half-reaction for proton exchange membrane water electrolysis, has been one of the most cutting-edge topics in electrocatalysis. A dual-doping strategy optimizes the catalyst electronic environment, modifies the coordination environment, generates vacancies, and introduces strain effects through the synergistic effect of two elements to achieve high catalytic performance. In this review, we summarize the progress of dual doping in RuO2 or IrO2 for acidic OERs. The three main mechanisms of OERs

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Kuznetsov, Vladimir G., Anton A. Gavrikov, Milos Krbal, Vladimir A. Trepakov, and Alexander V. Kolobov. "Amorphous As2S3 Doped with Transition Metals: An Ab Initio Study of Electronic Structure and Magnetic Properties." Nanomaterials 13, no. 5 (2023): 896. http://dx.doi.org/10.3390/nano13050896.

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Crystalline transition-metal chalcogenides are the focus of solid state research. At the same time, very little is known about amorphous chalcogenides doped with transition metals. To close this gap, we have studied, using first principle simulations, the effect of doping the typical chalcogenide glass As2S3 with transition metals (Mo, W and V). While the undoped glass is a semiconductor with a density functional theory gap of about 1 eV, doping results in the formation of a finite density of states (semiconductor-to-metal transformation) at the Fermi level accompanied by an appearance of magn

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44

Kim, Suhwan, Minho Choi, and Jongsung Park. "Cerium-Doped Oxide-Based Materials for Energy and Environmental Applications." Crystals 13, no. 12 (2023): 1631. http://dx.doi.org/10.3390/cryst13121631.

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Cerium is a rare-earth metal commonly used as a dopant in various metal oxides to enhance their performances or provide optoelectronic properties. Cerium oxide (ceria) is particularly valuable owing to its unique properties and applications in various fields, such as biomedical research, photovoltaics, and industrial catalytic processes. This review focuses on the use of cerium and ceria doping in the synthesis of SiO2 and ZnO. Studies have shown that Ce-doped SiO2 thin films exhibit luminescence properties and proton shielding capabilities, and that Ce-doped ZnO has potential applications in

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45

Piątkowska, Aleksandra, Magdalena Janus, Kacper Szymański, and Sylwia Mozia. "C-,N- and S-Doped TiO2 Photocatalysts: A Review." Catalysts 11, no. 1 (2021): 144. http://dx.doi.org/10.3390/catal11010144.

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This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the n

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46

Mehtab, Amir, Jahangeer Ahmed, Saad M. Alshehri, Yuanbing Mao, and Tokeer Ahmad. "Rare earth doped metal oxide nanoparticles for photocatalysis: a perspective." Nanotechnology 33, no. 14 (2022): 142001. http://dx.doi.org/10.1088/1361-6528/ac43e7.

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Abstract (sommario):

Abstract Metal oxides are well-known materials that have been considered as the prominent photocatalysts. Photocatalysis is a promising way to address the environmental issues which are caused by fossil fuel the combustion and industrial pollutants. Lot of efforts such as doping of metal oxides with metals, non-metals have been made to enhance their photocatalytic activity. More specifically, in this review we have discussed detailed synthesis procedures of rare earth doped metal oxides performed in the past decades. The advantage of doping metal oxides with rare earth metals is that they read

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47

Gao, Xiao Rui, Kang Le Jiang, Yu Qiao Wang, and Yong Jing Hao. "Effect of Doped Metal Ions on the Electrochemical Performance of Nickel Hydroxide Electrode for Nickel/Metal Hydride Battery." Applied Mechanics and Materials 448-453 (October 2013): 2942–45. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2942.

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Positive materials for nickel/metal hydride battery, nickel hydroxide doped by different metal ions were synthesized by coprecipitation, and subsequent hydrothermal treatment and anion exchange method. The structure of the samples was analyzed by XRD test, and the electrochemical performances were studied by galvanostatic charge-discharge, cyclic voltammetry and impedance tests. The obtained electrode material shows mainly β-Ni (OH)2structure when only doping Zn2+, while α-Ni (OH)2structure was obtained by only doping Al3+or co-doping Al3+and Zn2+. Ni (OH)2co-doped Al3+and Zn2+had fine cyclic

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48

Rodwihok, Chatchai, Duangmanee Wongratanaphisan, Tran Van Tam, Won Mook Choi, Seung Hyun Hur, and Jin Suk Chung. "Cerium-Oxide-Nanoparticle-Decorated Zinc Oxide with Enhanced Photocatalytic Degradation of Methyl Orange." Applied Sciences 10, no. 5 (2020): 1697. http://dx.doi.org/10.3390/app10051697.

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Cerium-oxide-nanoparticle-decorated zinc oxide was successfully prepared using a simple one-pot hydrothermal technique with different weight% Ce doping. It was found that an increase in Ce doping has an effect on the optical energy band-gap tunability. Ce dopant provides electron trapping on Ce/ZnO nanocomposites and also acts as a surface defect generator during hydrothermal processing. Additionally, a bi-metal oxide heterojunction forms, which acts as a charge separator to obstruct charge recombination and to increase the photodegradation performance. It was found that the methyl orange (MO)

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49

Ni, Junjie, Lu Yang, and Shu Chen. "Effect of transition metal doping on the photoelectric effect of monolayer NbS₂ under strain: First-principles calculations." Modern Physics Letters B, August 28, 2023. http://dx.doi.org/10.1142/s0217984924500015.

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In this paper, the effects of transition metal doping on the electronic structure of monolayer NbS2 were studied through the first principles. The electronic structure changes caused by doping transition metal (TM) atoms were recorded, including the energy band, the density of states, binding energy, and optical properties. Studies show that all doping systems are metal. Still, under strain regulation, some doping systems offer an indirect bandgap; NbS2 transforms into a narrow bandgap diluted semiconductor and can improve the activity. Doping atoms lead to [Formula: see text] type doping in N

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50

Jiang, Mingxi, Yajuan Zhang, Zihao Yang, et al. "A Data-driven Interpretable Method to Predict Capacities of Metal ion Doped TiO2 Anode Materials for Lithium-ion Batteries Using Machine Learning Classifiers." Inorganic Chemistry Frontiers, 2023. http://dx.doi.org/10.1039/d3qi01705b.

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Metal ion doping is an effective method to improve the electrochemical performance of metal oxide anode materials for lithium-ion batteries (LIBs). In the past many years, screening for dopant oxides...

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