Results 41 to 50 of about 5,131 (236)

Insulator-to-metal transition in sulfur-doped silicon [PDF]

, 2011
We observe an insulator-to-metal (I-M) transition in crystalline silicon doped with sulfur to non- equilibrium concentrations using ion implantation followed by pulsed laser melting and rapid resolidification. This I-M transition is due to a dopant known
Aurore J. Said, B. Shklovskii, Daniel Recht, Eric Mazur, H. G. Grimmeiss, H. H. Wieder, L. J. van der Pauw, Mark T. Winkler, Meng-Ju Sher, Michael J. Aziz, P. P. Edwards, S. Kobayashi   +11 more
core   +2 more sources

Theoretical Investigations on Heteronuclear Chalcogen−Chalcogen Interactions:  On the Nature of Weak Bonds between Chalcogen Centers

Inorganic Chemistry, 2007
To understand the intermolecular interactions between chalcogen centers (O, S, Se, Te), quantum chemical calculations on model systems were carried out. These model systems were pairs of monomers of the composition (CH3)2X1 (X1 = O, S, Se, Te) as the donors and CH3X2Z (with X2 = O, S, Se, Te and Z = Me, CN) as the acceptors.
Bleiholder, Christian, Gleiter, Rolf, Werz, Daniel B., Koeppel, Horst   +3 more
openaire   +3 more sources

Homoleptic Pnictogen–Chalcogen Coordination Complexes [PDF]

Inorganic Chemistry, 2012
The synthesis and structural characterization of dicationic selenium and tellurium analogues of the carbodiphosphorane and triphosphenium families of compounds are reported. These complexes, [Ch(dppe)][OTf](2) [Ch = Se, Te; dppe = 1,2-bis(diphenylphosphino)ethane; OTf = trifluoromethanesulfonate], are formed using [Ch](2+) reagents via a ligand ...
Dube, Jonathan, Hänninen, Mikko M., Dutton, Jason, Tuononen, Heikki, Ragogna, Paul   +4 more
openaire   +4 more sources

Selenium‐Incorporated Polymerized Nonfullerene Acceptors/SWCNT Composites with Polymer‐Assisted n‐Doping for High‐Performance Organic Thermoelectrics

Advanced Functional Materials, EarlyView.
Selenium‐incorporated polymerized nonfullerene acceptor PCB2Se forms a strong supramolecular complex with SWCNTs, enabling a record‐high zT of 0.29. Sequential N‐DMBI doping, mediated through a polymer‐assisted electron‐transfer pathway, successfully converts the PCB2Se/SWCNT composite into an efficient n‐type material with an impressive power factor ...
Chi‐Chun Tseng, Che‐An Chou, Chi Chang, Li‐Lun Yeh, Chien‐Yi Ku, Jhih‐Min Lin, Shih‐Huang Tung, Cheng‐Liang Liu, Yen‐Ju Cheng   +8 more
wiley   +1 more source

Electrons and phonons in single layers of hexagonal indium chalcogenides from ab initio calculations

, 2014
We use density functional theory to calculate the electronic band structures, cohesive energies, phonon dispersions, and optical absorption spectra of two-dimensional In$_2$X$_2$ crystals, where X is S, Se, or Te.
Drummond, N. D., Fal'ko, V. I., Zolyomi, V.   +2 more
core   +1 more source

The Nature of Strong Chalcogen Bonds Involving Chalcogen‐Containing Heterocycles

Angewandte Chemie International Edition, 2020
AbstractChalcogen bonds are σ hole interactions and have been used in recent years as an alternative to hydrogen bonds. In general, the electrostatic potential at the chalcogen atom and orbital delocalization effects are made responsible for the orientation of the chalcogen bond. Here, we were able to show by means of SAPT calculations that neither the
Gebhard Haberhauer, Rolf Gleiter
openaire   +2 more sources

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Coupling Electrochemical CO2 Reduction With Ethanol Oxidation for Acetate Production in a Dual‐Electrolyzer System

Angewandte Chemie, EarlyView.
A tandem cell system coupling electrochemical CO2 reduction and electrochemical ethanol oxidation is demonstrated for overall acetate production, providing concepts for a CO2‐negative bioethanol to acetate pathway. ABSTRACT Bioethanol production from biomass is suggested as a strategy for greener fuel production.
Anirudha Shekhawat, Shubhadeep Chandra, Ridha Zerdoumi, Bashir Eid, Muhammad Adib Abdillah Mahbub, Wolfgang Schuhmann   +5 more
wiley   +2 more sources

Bio-inspired silver selenide nano-chalcogens using aqueous extract of Melilotus officinalis with biological activities

Bioresources and Bioprocessing, 2021
For the first time, an aqueous extract of Melilotus officinalis was used to synthesize bimetallic silver selenide chalcogenide nanostructures (Ag2Se-NCs).
Seyedeh Zahra Mirzaei, Hamed Esmaeil Lashgarian, Maryam Karkhane, Kiana Shahzamani, Alaa Kamil Alhameedawi, Abdolrazagh Marzban   +5 more
doaj   +1 more source

Structural and Electronic Properties of Amorphous and Polycrystalline In2Se3 Films

, 2003
Structural and electronic properties of amorphous and single-phase polycrystalline films of gamma- and kappa-In2Se3 have been measured. The stable gamma phase nucleates homogeneously in the film bulk and has a high resistivity, while the metastable kappa
Ager, J. W., Chaiken, A., Gibson, G. A., Lee, Heon, Nauka, K., Walukiewicz, W., Wu, J., Yang, C. C., Yu, K. M.   +8 more
core   +1 more source