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Aqueous Zn-ion hybrid capacitor (ZIC) is a promising energy storage device owing to the cost-benefit and intrinsic safety conferred by the energy-dense Zn anode and capacitor-type cathode in aqueous electrolytes....

Synthesis and immobilization of Au nanoparticles (AuNPs) was performed on transparent fluorine-doped tin oxide (FTO) substrate by pulse electrodeposition method. The method was cost effective, simple and capable of producing nanoparticles strongly attached to the substrate. Effects of several influencing factors such as duty cycle, pulse frequency, current density, solution concentration, deposition period and annealing procedure on the optical properties of AuNPs-FTO electrode were investigated. AuNPs-FTO electrodes were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM) and UV-Vis absorption analysis. Controllability of the plasmon absorption of the electrodeposited film by tuning of the electrodeposition conditions and thermal annealing procedure was important achievements helpful to the progress of the AuNP film applications in the tunable localized surface plasmon resonance spectroscopy (LSPR) manufacturing industry.

A green precipitation method has been used for the synthesis of ultra-small APTMS-mPEG conjugated Mn 3 O 4 nanoparticles. Spherical cores in the uniform size of 4 � 1 nm were characterized by HRTEM. Zeta potential of À 45 mV and the invariant turbidimetry results during the time, confirmed super-stability of the colloids. MRI relaxometry by 1.5 T scanner represented two values of r 1 = 8.23 s À 1 mM À 1 and r 1 = 7.3 s À 1 mM À 1 for diluted and concentrated samples. The r 2 /r 1 ratio was also decreased from 11.86 to 6.9 by dilution of colloids. Particle aggregation and motional narrowing phenomena led to a dual T 1 /T 2 contrast agent in the Mn ion concentrations of more than 0.2 mM. The optimum concentration of Mn ion for maximum dual signal intensity was estimated about 0.4 mM which is two times less than commercial Gd-DTPA. Cytotoxicity was examined through MTT assay and respectively, showed high cell viability at 48 h incubation. Overall, a potential dual T 1 /T 2 contrast agent was developed for early-stage detection.

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