Results 81 to 90 of about 27,955 (249)

Gold Phytomining: a New Idea for Enviromental Sustainablity in Indonesia [PDF]

open access: yes, 2014
DOI: 10.17014/ijog.v1i1.171New technology is needed to protect the safety and health of communities and the environment at ASGM locations in Indonesia. This technology must be simple, cheap, easy to operate, and financially rewarding.
Anderson, C. (Christopher)   +1 more
core   +1 more source

Counteranion Engineering of Ethylenediammonium Salts for Reproducible Surface Modification in p–i–n Perovskite Solar Cells

open access: yesSolar RRL, Volume 10, Issue 3, 13 February 2026.
Engineering the counteranions of ethylenediammonium, a useful passivation molecule for perovskites, improves its solubility and clarifies how power conversion efficiency depends on concentration as well as on the choice of counteranion. This approach leads to improved reproducibility in perovskite solar cells.
Akio Hasegawa   +8 more
wiley   +1 more source

Advanced Surface Engineering and Passivation Strategies of Quantum Dots for Breaking Efficiency Barrier of Clean Energy Technologies: A Comprehensive Review

open access: yesAdvanced Functional Materials, Volume 36, Issue 4, 12 January 2026.
This review describes the different surface engineering strategies for quantum dots that addresses the challenges associated with surface defects, highlighting their role in enhancing the performance of solar energy conversion technologies. Abstract Colloidal quantum dots (QDs) have garnered significant attention for their unique potential in clean ...
Kokilavani S., Gurpreet Singh Selopal
wiley   +1 more source

Synthesis and Nucleophilic Reactions of Bifunctional Thiourea S,S,S-Trioxides [PDF]

open access: yes, 1989
The synthesis of bifunctional thioureas and the corresponding thiourea S,S,S-trioxides has been examined. Two methods for the synthesis of the bisthioureas were employed. One involved the treatment of a diamine with silicon tetraisothiocyanate in benzene.
Webb \u2789, Dan
core   +1 more source

Crystallization Modulation and Defect Passivation of Tin‐Based Perovskite Light‐Emitting Diodes Avoiding DMSO

open access: yesAdvanced Optical Materials, Volume 14, Issue 3, 19 January 2026.
Tin‐based perovskites offer a lead‐free alternative for perovskite light‐emitting diodes (PeLEDs) but suffer from poor performance due to uncontrolled crystallization and Sn(II) oxidation. Here, NH4SCN is introduced into a DMSO‐free precursor to regulate crystallization, suppress Sn(II) oxidation, and reduce defects, enabling pure‐red PeLEDs with an ...
Shun Tian   +13 more
wiley   +1 more source

Synthesis and Spectral Study of New Guanine Derivative (N-((6-Oxo-6,9-Dihydro-1H-Purin-2-yl)Carbamothioyl)Propionamide) and its Complexes with Some Metals Ion

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences
This study included the preparation and characterization of the new guanine derivative (N-((6-oxo-6,9-dihydro-1H-purin-2-yl)carbamothioyl)propionamide), with an exciting chemical structure.
Abdullah Sh. Abdullah Alani   +2 more
doaj   +1 more source

Review on Perovskite Solar Cells: From Single‐Junction Devices to Tandem Deployment in Space

open access: yesAdvanced Sustainable Systems, Volume 10, Issue 1, January 2026.
Perovskite solar cells rapidly approach commercial viability through advances in mixed‐cation compositions, device architectures, and standardized stability protocols. This review summarizes the progress from stabilized single‐junction devices to high‐efficiency tandem cells, scalable manufacturing strategies, and emerging space applications ...
Jiawei Gong, Luke Schneider, Yongtao Liu
wiley   +1 more source

Determination of Iron Content in Iron Deficiency Drugs by UV-Visible Spectrophotometer

open access: yesOrbital: The Electronic Journal of Chemistry, 2017
The objective of this work was to validate a simple, precise and accurate spectrophotometric method for the determination of iron in the iron deficiency drugs, namely are Feroglobin B12, Ferose-F and Ferose.
Isam Eldin Hussein Elgailani   +1 more
doaj   +3 more sources

Fluorescent copper(II) complexes: The electron transfer mechanism, interaction with bovine serum albumin (BSA) and antibacterial activity

open access: yesJournal of Saudi Chemical Society, 2017
Dinuclear copper(II) complexes with formula [Cu2(L)2(N3)2] (1) and [Cu2(L)2(NCS)2] (2) HL = (1-[(3-methyl-pyridine-2-ylimino)-methyl]-naphthalen-2-ol) were synthesized by controlling the molar ratio of Cu(OAC)2·6H2O, HL, sodium azide (1) and ammonium ...
Madhumita Hazra   +4 more
doaj   +1 more source

The use of isoxazoline and isoxazole scaffolding in the design of novel thiourea and amide liquid-crystalline compounds

open access: yesBeilstein Journal of Organic Chemistry, 2020
A series of novel thiourea and amide liquid crystals containing 5-membered isoxazoline and isoxazole rings were synthetized and the liquid crystal properties studied.
Itamar L. Gonçalves   +3 more
doaj   +1 more source

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