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Cd and Co metal centered nicotinamide/nicotinic acid complexes were synthesized by chemical reactions. The complexes were characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT‐IR), powder X‐ray diffractometer (P‐XRD), ultraviolet–visible (UV–Vis) spectrometer, and scanning electron microscopy (SEM) with energy dispersive X‐ray (EDX) detector. The complexes were used as interfacial layers in between Al and p‐Si to fabricate Al/Cd‐complex/p‐Si and Al/Co‐complex/p‐Si metal semiconductor devices. The devices were characterized by current–voltage (I‐V) and current‐time (I‐t) measurements under dark and various light power intensities. The ideality factor, barrier height, and series resistance values were extracted from I‐V measurements and discussed in detail by various techniques. The I‐t measurements were used to derive various detector parameters such as responsivity, photosensitivity, and specific detectivity for various power values and wavelength regions. The devices exhibited good photodiode and photodetector performance according to results, and they can be improved for optoelectronic applications.

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Nanofibers have great importance in the membrane technology used in hydrophobic surface filtration studies applied to water-oil separation products. This study improves upon the hydrophobic properties of electrospun polystyrene-based nanofibers by increasing surface contact angles. As a result, nanofibers have been produced by adding ZnO, MoO3, NiO, SiO2, and TiO2 additives to the polystyrene (PS)/dimethylformamide (DMF) polymer solution at 5% of the mass. Surface contact angle (CA), fourier-transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) images of the nanofibers were taken. The obtained results were evaluated and show the fiber diameter to range from 555 to 1553 nm. The addition process was observed to be able to affect the polystyrene fiber’s ability to retain water. Moreover, surface contact angle of polystyrene increased to 143° by TiO2 addition. Furthermore, the highest oil-carrying capacity is concluded to have been observed on the SiO2 and MoO3 doped fibers.

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