Structural characterization and observation of variable range hopping conduction mechanism at high temperature in CdSe quantum dot solids

Abstract

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Electrical transport properties of nanocrystalline nonstoichiometric nickel ferrite at and above room temperature

“…Where J max is given by the relation [42] , it has been observed that the J max values are lower than the values of J over the investigated temperature range 298 K to 523 K. Therefore we may conclude that the adiabatic small polaron model is suitable to describe the thermal behavior of conductivity. Similar behavior has been obtained in CdSe quantum dot [38]. At lower temperature, a deviation from linearity has been observed due to weak polaronic hopping conduction.…”

“…For electrical measurement, first pellets having 1 cm diameter were made by pressing the powder at 500 MPa hydraulic pressures and fine copper wire was attached to it by highly conducting silver paste. The details experimental technique was described in the previous publications [38,39].…”

Single step synthesis of ZnS quantum dots and their microstructure characterization and electrical transport below room temperature

“…Due to large surface to volume ratio and quantum confinement effects, the nanomaterials exhibit novel electrical, magnetic and optical properties as compared to their bulk counterparts. Recently, nanostructures viz., nanoparticles, nanofibers, nanotubes, QD etc have received remarkable attention among the scientific community owing to their potential applications [20][21][22][23][24]. Despite the remarkable progress in the field of nanostructures, both in terms of fundamental and technological viewpoints, charge transport mechanism in such disordered low dimensional structures has not been fully understood.…”

Electrical transport properties of consolidated ZnSe quantum dots at and above room temperature

“…We have followed here a modified low temperature synthesis procedure [17]. Sodium selenosulfate (Na 2 SeSO 3 ) was prepared by a method described previously [4]. It was then kept as a source of selenium (Se 2À ) ions.…”