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Regular monitoring of bacteria, especially Escherichia coli, in wastewater is crucial to ensure the maintenance of public health. Amperometric detection proves to be a fast, sensitive and economically viable solution for E. coli enumeration. This paper reported a prototype amperometric sensor based on PANI-ZnO-NiO nanocomposite thin films prepared by sol–gel method and irradiated with gamma ray. The purpose of this study is to investigate the sensor performance of PANI-ZnO-NiO nanocomposite thin films to detect E. coli in water.

The films were varied with different compositions of ZnO and NiO by using the formula PANI-(ZnO)_1-x-(NiO)_x, with x = 0.2, 0.4, 0.6 and 0.8. PANI-ZnO-NiO nanocomposite thin films were characterized by using X-ray diffraction (XRD) and atomic force microscopy (AFM) to study the crystallinity and surface morphology of the films. The sensor performance was conducted using the current–voltage (I-V) measurement by testing the films in clean water and E. coli solution.

XRD diffractograms show the peaks of ZnO (1 0 0) and NiO (1 0 2). AFM analysis shows the surface roughness, and the grain size of PANI-ZnO-NiO thin films decreases when the concentration ratios of NiO increased. I-V curves show the difference in current flow, where the current in E. coli solution is higher than the clean water.

PANI-(ZnO)_1-x-(NiO)_x nanocomposite thin film with the highest concentration of ZnO performed the highest sensitivity among the other concentrations, which can be used to indicate the presence of E. coli bacteria in water.

The purpose of this paper is to examine the relationship between corporate social responsibility (CSR) and corporate financial performance (CFP) of Malaysian public listed companies (PLCs) as an emerging market setting.

A longitudinal data analysis with a large‐sample testing was carried out from 200 Malaysian PLCs by using panel data analysis during a seven‐years period. The statistical power with fixed effect and random effect model was utilized.

Results of earlier estimations indicate that there are positive and significant related of the CSR on CFP. Two of the CSR dimensions, namely employee relations and community involvement, were found to be positively related to financial performance. This proves that CSR practices can be considered as effort to enhance the financial performance of PLCs in Malaysia. The results also reveal that there is limited evidence of the relationship between CSR and CFP in the longterm.

These findings suggest that Malaysian PLCs should be involved consistently in their CSR practices because CSR has a significant impact on improving financial performance in Malaysian PLCs.

The majority of studies on CSR in Malaysia pertain to the analysis of such reporting and motivations of managers toward CSR practices. This study conducts a comprehensive empirical research on the relationship between CSR and CFP in Malaysian PLCs.