Article
Materials Science, Multidisciplinary
A. N. Mihalyuk, Y. E. Vekovshinin, L. V. Bondarenko, A. Y. Tupchaya, T. V. Utas, D. V. Gruznev, S. V. Eremeev, A. V. Zotov, A. A. Saranin
Summary: Co-adsorption of Pb and Bi onto Si(111) and Ge(111) surfaces leads to the formation of atomic-layer PbBi compounds with similar structures. These compounds exhibit different electronic properties, with the PbBi compound on Ge(111) showing a distinct behavior compared to that on Si(111). These findings are expected to be significant for the development of new electronic devices in the ultimate two-dimensional limit.
FRONTIERS IN MATERIALS
(2022)
Review
Polymer Science
Farzad Seidi, Wei-Feng Zhao, Hui-Ning Xiao, Yong-Can Jin, Mohammad Reza Saeb, Chang-Sheng Zhao
Summary: This review provides a comprehensive overview of strategies for surface tethering of hydrogel layers via crosslinking immobilization of pre-fabricated functional polymers. The principles of hydrogel tethering are explained in detail with representative examples, along with discussions on potential applications of the modified substrates in specific cases.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Jibao Wu
Summary: The coverage-dependent adsorption and stability of functionalized Ge(1 0 0) and (1 1 1) surfaces terminated with different chemical groups were systematically investigated using density functional theory calculations. The results show that Ge-X chemical bond slightly decreases with the increase of surface coverage, and Ge(1 1 1) surface exhibits stronger adsorption stability compared to Ge(1 0 0) surface.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Inshad Jum'h, Husam H. Abu-Safe, Morgan E. Ware, I. A. Qattan, Ahmad Telfah, Carlos J. Tavares
Summary: This study investigates the surface atomic arrangement and physical properties of aluminum ultrathin layers deposited on c-Si(111)-7 x 7 and hydrogen-terminated c-Si(111)-1 x 1 surfaces using molecular beam epitaxy. X-ray photoelectron spectroscopy was used to determine the surface species, and 3D atomic force microscopy was used to investigate clustering formations in the film structure. Reflection high-energy electron diffraction experiments confirmed the surface crystalline structure of the c-Si(111) during the deposition of the aluminum layers. The surface electrical conductivity was tested against atmospheric oxidation, showing differences in conductivity based on the formation of various alloys on the surface.
Article
Chemistry, Multidisciplinary
L. Zhang, H. Farkhondeh, F. R. Rahsepar, A. Chatterjee, K. T. Leung
Summary: The study reveals that alanine binds to the Si(111)7x7 surface through N-Si covalent bonding and adsorbs onto Si atoms through N-H dissociative adsorption. DFT calculations suggest that the O-Si bonding configuration is more thermodynamically favorable than the N-Si bonding configuration, indicating that the interfacial dissociative adsorption reaction is kinetically controlled.
Article
Chemistry, Physical
Joseph M. Gurrentz, Michael J. Rose
Summary: Polyoxometalates (POMs) have been investigated as multiredox components in functional molecular materials, and an improved approach for covalent POM immobilization on high-quality silicon surfaces has been demonstrated. The POM-modified Si electrodes showed multiple redox transitions and high-quality electronic properties, with potential for photoelectrochemical applications. The study provides insights into the thermodynamic interplay between the Si substrate and POM molecular overlayer in defining the functional outcome of the Si|POM system.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Arun Kumar, Raimondo Cecchini, Lorenzo Locatelli, Claudia Wiemer, Christian Martella, Lucia Nasi, Laura Lazzarini, Roberto Mantovan, Massimo Longo
Summary: This study achieved the optimized large-area growth of Bi2Te3 epitaxial layers on unbuffered i-Si(111) substrates via MOVPE and identified the key factors for maximizing layer quality. The grown Bi2Te3 thin layers exhibit high crystal quality, stoichiometry, uniformity, and topological insulator properties, showing potential for technology transfer to innovative devices.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Philipp Dabringhaus, Silja Zedlitz, Luisa Giarrana, David Scheschkewitz, Ingo Krossing
Summary: Schnockel's [(AlCp*)(4)] and Jutzi's [SiCp*][B(C6F5)(4)] are important in modern main-group chemistry with various applications in synthesis and catalysis. However, the reactivity between AlCp* and [SiCp*](+) has not been explored. In this study, their reaction was investigated and complex salts [Cp*Si(AlCp*)(3)][WCA] were obtained. The tetrahedral [SiAl3](+) core not only represents a rare example of a low-valent silicon-doped aluminium-cluster, but also provides a convenient preparative entry towards low-valent Si-Al clusters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
M. Baljozovic, B. Arnoldi, S. Grass, J. Lacour, M. Aeschlimann, B. Stadtmueller, K. -H. Ernst
Summary: It has been shown that electrons interact differently with chiral molecules depending on their polarization. Previous photoemission experiments on enantiomeric pure monolayers of heptahelicene reported opposite asymmetries in spin polarization, attributed to the chirality-induced spin selectivity effect. However, these experiments lack the necessary angular and energy resolution to understand the mechanism of this phenomenon. To fill in the gaps, a detailed spin- and angle-resolved photoemission spectroscopy study of heptahelicene layers on a Cu(111) substrate was conducted, but no chirality-induced spin asymmetry in photoemission was observed. Possible reasons for the absence of spin-dependent electron transmission signatures through the chiral molecular layer are briefly discussed.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Hongye Yuan, Weichu Fu, Nadia Soulmi, Christian Serre, Nathalie Steunou, Michel Rosso, Catherine Henry de Villeneuve
Summary: This study reports the direct growth of Fe3+/benzene di-carboxylate MOFs onto functionalized silicon surfaces and reveals the co-nucleation and growth of different crystalline phases. Three structural phases are identified, and the formation of MIL-101 nano-crystallites or thin layers/islands is demonstrated.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Physical
Yu Guo, Yanyan Zhao, Wei Pei, Si Zhou, Jijun Zhao
Summary: For the first time, we demonstrate that the Si(111)-(7 x 7) surface is an ideal substrate for producing subnanometer identical metal clusters for catalysis. The Pd-6 cluster on the Si(111)-(7 x 7) surface selectively converts CO2 to high-value C-2-C-4 hydrocarbons and alcohols. This offers a facile strategy for obtaining and utilizing identical metal clusters for clean energy production.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Ryan Gotchy Mullen, Nir Goldman
Summary: Hydriding corrosion of plutonium causes surface cracking, pitting, and structural failure. This study calculates the surface energies of low facet surfaces of face-centered cubic delta-Pu, and discusses the adsorption free energies of hydrogen structures at different coverage levels, as well as the progression of filling sites with increasing H-2 partial pressure. Implications for near-equilibrium pressure hydride nucleation and non-equilibrium millibar pressure hydriding are explored.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Zheng Chen, He Wang, Zhangyun Liu, Xin Xu
Summary: This study introduces a new protocol for an operando theoretical analysis, demonstrating the significance of local surface coverage in tuning catalysis through investigations on the conversion of Syngas on Rh(111) surfaces.
Article
Materials Science, Multidisciplinary
Divya Gupta, G. R. Umapathy, Rahul Singhal, Sunil Ojha, Sanjeev Aggarwal
Summary: Controlled surface structuring of amorphous silicon carbide thin films on silicon substrates by RF sputtering and obliquely incident Ar+ ion beam irradiation was investigated. Sub-wavelength ripple patterns were found to evolve on argon sputtered surfaces, and their parameters varied nonlinearly with the ion fluence. The preferential sputtering of silicon over carbon is responsible for the formation of these surface structures, and ion irradiation can be utilized to fabricate controlled surface nanostructures by optimizing the irradiation parameters.
Article
Chemistry, Physical
Boyu Fu, Jianqun Geng, Zongfan Yang, Yong Zhang, Shijie Sun, Zilin Ruan, Hui Zhang, Wei Xiong, Gefei Niu, Yi Zhang, Long Chen, Lei Gao, Jianchen Lu, Jinming Cai
Summary: Using brominated N-heterocyclic molecules, supramolecular assembly structures were successfully constructed on Au(111) surfaces. The formation of these structures was influenced by coverage, spatial configuration, and the types of bonds involved. This study provides a potential route for constructing more supramolecular nanostructures, which may impact the future design of molecular nanomaterials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Meiqi Zhang, Fabien Grasset, Yuji Masubuchi, Toshihiro Shimada, Thi Kim Ngan Nguyen, Noee Dumait, Adele Renaud, Stephane Cordier, David Berthebaud, Jean-Francois Halet, Tetsuo Uchikoshi
Summary: The Mo cluster-MoS2 composite was synthesized through a one-step sulfurization process using H2/H2S gas flow. The decomposed Mo-6 cluster iodides acted as a template and precursor, forming complex Mo cluster compounds and eventually producing MoS2. After sulfurization, the response of the composite to NH3 gas increased three times while showing conversion from p-type to n-type semiconductor, enhancing its potential for device applications.
Article
Chemistry, Multidisciplinary
Maria Amela-Cortes, Noee Dumait, Franck Artzner, Stephane Cordier, Yann Molard
Summary: A luminescent nanocomposite based on red-NIR phosphorescent molybdenum nanoclusters embedded in an eco-friendly cellulose biopolymer matrix was developed. Homogeneity was maintained up to 20 wt% of cluster complex doping, and annealing hybrids led to a significant increase in their emission efficiency.
Article
Energy & Fuels
Tatiana Lappi, Stephane Cordier, Yakov Gayfulin, Soraya Ababou-Girard, Fabien Grasset, Tetsuo Uchikoshi, Nikolay G. Naumov, Adele Renaud
Summary: This study investigates the effect of metal/ligand on the photoinduced conductivity properties of two types of cluster core building blocks, {Re6S8i} and {Re6Se8i}, using a comprehensive range of characterization techniques. The composition of {Re(6)Q(8)(i)}-based films (Q = S or Se) significantly affects their optical and electronic properties. By increasing the interactions between the cluster building blocks through heating, the electronic properties can be enhanced. The design of mixed {Re(6)Q(8)(i)}-based photoelectrodes combining n-{Re6S8i} and p-{Re6Se8i} cluster core-based building blocks allows for the optimization of photocurrents, making them attractive for solar cell applications.
Article
Chemistry, Inorganic & Nuclear
Tatiana A. . Pomelova, Charlene Delacotte, Natalia Kuratieva, Pierric Lemoine, Stephane Cordier, SangJun Park, Thierry Guizouarn, Vincent Pelletier, Regis Gautier, Nikolay G. Naumov
Summary: This work presents the synthesis, crystal and electronic structures, and magnetic properties of new quaternary sulfides Cs2Ln3CuS8 (Ln = La-Nd, Sm-Tb). These sulfides are prepared using a reactive flux method and exhibit a new type of structure (C2/m space group) with a layer-like crystal structure. The Cs2Gd3CuS8 compound shows significant magnetic refrigerating properties with a mass entropy change (-Delta SM) of 19.5 J kg-1 K-1 at 3.5 K and Delta H = 5 T.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Tatiana I. Lappi, Yakov M. Gaifulin, Vadim V. Yanshole, Stephane Cordier, Nikolay G. Naumov
Summary: In this study, a high-temperature reaction between ReS2, MoS2, and KCN was investigated, resulting in the formation of a cluster-based K6[Re6-xMoxS8(CN)5] solid solution. The crystal structure is based on chains of [Re6-xMoxS8(CN)6] cluster units. The composition of the product can be varied within the range of x = 2.75-3.63 depending on the sintering temperature of starting sulfides and the reaction temperature with KCN.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Gilles Daigre, Maria S. S. Tarasenko, Alexandra Yu. Ledneva, Nikolai G. G. Naumov, Nathalie Audebrand, Stephane Cordier
Summary: In this study, two inorganic polymeric cluster compounds, Cs[Mn(salen)](3)[{Mo6Br6Se2}(CN)(6)] (1) and (H3O)(TBA)[Mn(salen)](2)[{Mo6Br6Se2}(CN)(6)] (2), were synthesized and their structures were characterized. The compounds were built-up using [{Mo6Br6Se2}(CN)(6)](4-) building blocks and Mn(salen)(+) complexes. The counter cations (Cs+ or TBA(+)) played a crucial role in controlling the interactions between the building blocks and the Mn(salen)(+) groups. Compound 1 was obtained by diffusion of K2Cs2[{Mo6Br6Se2}(CN)(6)] cluster compound into a solution of Mn(salen)ClO4, while compound 2 was obtained by addition of tetrabutylammonium bromide into the solution of Mn(salen)ClO4. The structures of 1 and 2 were discussed and compared with relevant examples from literature.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Nanoscience & Nanotechnology
Irene Carrasco, Philipp Ehni, Max Ebert, Noeie Dumait, Gregory Taupier, Maria Amela-Cortes, Claire Roiland, Steiphane Cordier, Julius A. Knoeller, Emmanuel Jacques, Sabine Laschat, Yann Molard
Summary: In this work, it is shown that red near-infrared emissive metal cluster compounds can readily form 1:1 complexes with discotic liquid crystals containing a crown ether, enhancing charge carrier mobility by 5 orders of magnitude compared to organic ligands.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Tatiana I. Lappi, Yakov M. Gayfulin, Adele Renaud, Carmelo Prestipino, Pierric Lemoine, Vadim V. Yanshole, Viktoria K. Muravieva, Stephane Cordier, Nikolai G. Naumov
Summary: A series of new cluster compounds containing {Re4Mo2S8} and {Re3Mo3S8} cores have been synthesized and studied. The clusters with different Re/Mo ratios were obtained as separate compounds, allowing for characterization of their spectroscopic and electrochemical properties. The geometry of the clusters was determined using X-ray diffraction analysis, XAS, and quantum chemical DFT calculations. The results showed that the new clusters exhibit similar properties to clusters based on {Re4Mo2Se8} and {Re3Mo3Se8} cores, including the number and position of electrochemical transitions, electronic structure, and changes in geometry upon charge variation.
Article
Multidisciplinary Sciences
Alexandra Yu. Ledneva, Mariia N. Ivanova, Pavel A. Poltarak, Spartak S. Yarovoy, Boris A. Kolesov, Vladimir E. Fedorov, Nikolay G. Naumov
Summary: A series of rhenium compounds with octahedral cluster core and molecular and polymeric structures were synthesized. The analysis of their vibrational spectra revealed that the composition and symmetry of the cluster core affected the main characteristic bands in both ionic and polymeric compounds.
Article
Materials Science, Multidisciplinary
Alexis Verger, Gilles Dollo, Nolwenn Brandhonneur, Sophie Martinais, Stephane Cordier, Kamil Lang, Maria Amela-Cortes, Kaplan Kirakci
Summary: Efficient intracellular uptake of the photosensitizer is necessary for photodynamic applications. In this study, PEGylated poly(lactic-co-glycolic acid) nanoparticles loaded with an octahedral molybdenum cluster complex were prepared. The encapsulated complexes maintained their photocytotoxic activity and exhibited high colloidal stability, making them potential agents for photodynamic therapy.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Anam Fatima, Yevheniia Smortsova, Clement Falaise, Nathalie Leclerc, Mohamed Haouas, Emmanuel Cadot, Stephane Cordier, Yann Molard, Thomas Pino, Celine Dablemont, Rachel Meallet, Karine Steenkeste, Minh-Huong Ha-Thi
Summary: This paper reports the evidence of photoinduced intermolecular electron transfer from the excited state of the [Mo6I8Cl6](2-) electron-rich cluster to polyoxometalates (POMs). The efficiency of electron transfer is shown to be affected by the global charge density of POMs. This work paves the way for the rational design of photocatalytic systems using cluster-based complexes as robust noble-metal-free photosensitizers.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Anam Fatima, Yevheniia Smortsova, Clement Falaise, Nathalie Leclerc, Mohamed Haouas, Emmanuel Cadot, Stephane Cordier, Yann Molard, Thomas Pino, Celine Dablemont, Rachel Meallet, Karine Steenkeste, Minh-Huong Ha-Thi
Summary: Evidence is reported for photoinduced intermolecular electron transfer from the excited state of the [Mo6I8Cl6](2)- electron-rich cluster to polyoxometalates (POMs). The efficiency of electron transfer is demonstrated to be affected by the global charge density of POMs. This work paves the way for the rational design of photocatalytic systems using cluster-based complexes as robust noble-metal-free photosensitizers.
CHEMICAL COMMUNICATIONS
(2023)