Hydrothermal growth of ZnO nanoparticles under different conditions

In this study, a simple low-temperature hydrothermal method was used to synthesize ZnO nanoparticles. The structural, morphological and optical characterizations of the nanoparticles were evaluated with regard to the zinc content. To achieve this, the molar ratios of the precursors were changed from 0.05 to 0.1 M. The structural and morphological analyses showed that all samples had a polycrystalline hexangular wurtzite crystal structure and the shape of the ZnO nanoparticles changed with increasing zinc content. A possible growth mechanism of the ZnO nanoparticles is explained in terms of the zinc content. Optical measurement revealed that the shape of the nanoparticles affects the position of the band-edge emission as well as the shape of the luminescence spectrum.     

Which One Triggers the Other? Technological or Social Innovation

The term innovation has sometimes been used as a synonym for technological innovation until the concept of social innovation attracted academic attention. Since then, these two types of innovation have been investigated individually. It can be claimed that, despite the great importance of social innovation studies, technological innovation studies received more attention. In addition, there are limited studies that have examined technological and social innovation together. The aim of this study was to examine the causal relationship between technological and social innovations. The impact of entrepreneurial characteristics on social innovation was also analyzed. This study was based on a comprehensive field study including 767 university students from 10 universities from different regions of Turkey. Regression analyses and structural equation modeling confirmed that social and technological innovation were related to one another, and both were correlated with a particular constellation of personal characteristics.