High efficiency self-cleaning of nanocomposites ZnO with additional chitosan for helping electron and hole transport.

ZnO/chitosan coated wool fabric has been applied as a self-cleaning which obtained through sol-gel method for various pH: 5, 7, and 9. The self-cleaning test was carried out by irradiating the cloth samples using UVA-UVB lamps up to 15 h with dye for the clothing stain. ZnO/chitosan composites were characterized using X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), and UV-Visible spectroscopy. The diffraction spectra from chitosan for pH 9 is 19.56°. The vibration bond at the wavenumbers 422 cm-1- 621 cm-1 identified as ZnO bond and at the wavenumber 3495 cm-1 identified for stretching -OH and -NH2 from chitosan. Optical properties were analysed using the Kamers Kronig (KK) relation which was applied to the FTIR spectra and shows the highest distance between two optical photon vibration modes (∆ (LO-TO)) is 199 cm-1 was obtained when the pH 9. The pH 9 is the best self-cleaning performance for dye stain which completely lost after being exposed for 15 h irradiation. Samples pH 9 shows the best self-cleaning due to the smallest crystallite size and highest bandgap and (∆ (LO-TO)) indicated high potential for new self-cleaning material in future.

The Implication of Digital Organisational Culture on Firm Performance.

Digital technologies have become a major factor for innovation in the business environment. Organisations have taken advantage of digitised data and information to increase performance. However, there is still little research focusing on the effect of digitalisation on organisational culture, which in the end will affect performance. We develop this research by exploring a proposed model involving digital organisational culture with the final goal to enhance organisational performance. The research involved 263 managers of state-owned companies in Indonesia. We analysed the theoretical model by using structural equation modelling and processed the data using the SmartPLS version 3 software. We conclude that digital organisational culture can become an essential factor in improving digital strategy and performance. However, business digitalisation does not really affect digital organisational values.