Effect of size restriction on the static and dynamic emission behavior of silver bromide

Metal‐halide Nanoparticle Formation: Electrolytic and Chemical Synthesis of Mercury(I) Chloride Nanoparticles

“…[7][8][9] Other methods include the controlled precipitation of metal halides in aqueous media, for example, AgBr NP suspensions stabilised in solution by materials such as gelatine [10] and cucurbit[n]uril macrocycles. [11] Although the area has seen significant development, there are few examples for the formation of particles of sizes 20-100 nm without complex multi-step chemical processes and stabilising organic coatings.…”

Quantum Size Effects in the Photonics of Semiconductor Nanoparticles

“…4) [261]. The relations between the positions of the exciton and "defect" emission maxima and the particle size were obtained for nanoparticles of CdS [21, 42, 46, 77-79, 82, 83, 90, 92, 98, 99, 114, 116, 118, 119, 123, 126, 130, 131, 133, 138, 139, 305-307], HgS [83,144], MoS 2 [160], ZnS [83,[152][153][154][155][156]308], PbS [163,167,168], In 2 S 3 [158], Cu x S [174], CdSe [24, 46, 48, 71, 205, 212-223, 226, 228, 229, 253, 309], CdSe/ZnS [234,235], CdSe/CdS [223,236], ZnSe [244,245,247], PbSe [73,241,242], HgSe [310], CdTe [51, 253-259, 265, 269, 271, 272, 304, 310, 311], CdSe x Te 1-x [239,240,294], CuInSe 2x Te 2(1-x) [252], AgI [276], AgBr [273], CuBr [279], CuCl [4], PbI 2 [282], ZnO [77, 178-180, 184, 188, 295, 312-315], TiO 2 [190,194], In 2 O 3 [316], CeO 2 [134], Al 2 O 3 …”

Size Confinement Effects on Electronic and Optical Properties of Silver Halide Nanocrystals as Probed by Cryo-EFTEM and EELS

“…Silver halides, AgX (X=Br, I, Cl), well known as quantum detectors, exhibit many remarkable solid-state properties that have made them highly attractive both for fundamental and applied research [1][2][3][4][5][6][7][8][9][10][11][12][13]. In addition to the unique character of optical absorption, the strong quadrupolar deformability of the Ag + is responsible for a soft crystal lattice, which is significantly less rigid than one for cations of alkali halides [1][2][3][4].…”

“…The occurrence of a low-energy indirect gap between the valence and conduction bands results in size restriction effects on the electronic properties of nanocrystalline silver halides, when the particle size decreases below 100 nm [1][2][3][4][5][6][7][8][9]. Quantum confinement usually occurs when the spatial extent of a material (boundary conditions) begins to affect the eigenenergies of the electron wave function, causing the electronic properties to differ from those of bulk solid.…”

“…The restricted geometry leads to the occurrence of surface recombination that becomes a dominant relaxation channel in crystals with sizes already less than 500 nm [5]. Quantum effects of excitons in AgX nanocrystals (NCs) have been demonstrated by the appearance of the indirect exciton luminescence forbidden by selection rules in large crystals and by an increase of its quantum yield by several orders of magnitude when the particle size is decreased from 80 to 7.9 nm [6,7]. A high-energy shift of luminescence band maxima of free excitons in the case of 40-nm-sized Ag(Br, I) NCs was also found [7,8].…”