Universal Approach to the Synthesis of Silver Sulfide in the Forms of Nanopowders, Quantum Dots, Core‐Shell Nanoparticles, and Heteronanostructures

Abstract

Nanostructured silver sulfide is one of the semiconducting chalcogenides most in demand, due to its unique combination of structure, physical, and chemical properties, and its potential applications in optoelectronics, biosensing, and catalysis. Much research has been carried out in the last decade, with the goals of producing silver sulfide in the form of nanopowders, stable colloidal solutions, quantum dots with protec-

Recent progress in nanostructured silver sulfide: from synthesis and nonstoichiometry to properties

“…The concentration of Na 2 S in the initial reaction mixtures was slightly over half of the AgNO 3 concentration, i.e., C Na 2 S ¼ (C AgNO 3 /2) + d with d ¼ 0.5 mmol l À1 . 136 The average particle size (D) in the examined Ag 2 S nanopowders was about 46 AE 7 nm.…”

“…Conditions of hydrochemical bath deposition for preparing different forms of nanostructured Ag 2 S, and the previously unknown possibilities of this method are generalized in study. 136 Hydrochemical deposition of nanostructured Ag 2 S with using Na 3 Cit is an example of green chemistry because of the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances. 140 Indeed, hydrochemical bath deposition allows one to obtain valuable products from harmless substances using environmentally friendly methods.…”

“…The Na 2 S concentration (C Na 2 S ) in the reaction mixtures was slightly over half of the AgNO 3 concentration (i.e., C Na 2 S ¼ (C AgNO 3 /2) + d, where d ¼ 0.01 mmol l À1 ). 136 According to the dynamic light scattering (DLS) data, the size of Ag 2 S quantum dots in colloidal solutions was #20 nm. The DLS zeta-potential measurements of colloidal solutions conrmed that these solutions remained stable for >100 days.…”

Facile Synthesis and Characterization of Ag/Ag2S Nanoparticles Enzymatically Grown In Situ and their Application to the Colorimetric Detection of Glucose Oxidase

“…From the HR‐TEM images we can slightly distinguish two heteronanostructures containing two phases: monoclinic silver sulfide with α‐Ag 2 S acanthite structure and metallic cubic Ag. The lattice fringe spacing of 2.33 Å is consistent with the (111) lattice planes of the cubic metallic Ag and the one of 2.46 Å is associated with the (111) planes of the acanthite, the natural structure of Ag 2 S at low temperatures . Electron diffraction analysis also showed the presence of crystalline Ag structures (reflection from (111) plane) and an amorphous shell associated to the Ag 2 S moiety containing the reflection from the (‐113), (031) and (120) planes.…”

Тепловое расширение и теплоемкость нанокристаллического и крупнокристаллического сульфида серебра Ag-=SUB=-2-=/SUB=-S

“…Размер частиц регулировался путем изменения концентраций реагентов и продолжительностью нахождения осадков в реакционных смесях. Методика синтеза описана ра-нее [9,10,21,22]. Заметим, что химическое осаждение сульфидов из водных растворов является частным слу-чаем one-pot синтеза [23], который позволяет синтези-ровать неорганические наночастицы непосредственно в водной среде.…”