Abstract
In the present study, we propose a method for bio-nano hybrid formation by coupling a redox metalloprotein, Azurin, with CdSe-ZnS quantum dot for the development of a nanoscale resistive memory device. The covalent interaction between the two nanomaterials enables a strong and effective binding to form an azurin/CdSe-ZnS hybrid, and also enabled better controllability to couple with electrodes to examine the memory function properties. Morphological and optical properties were performed to confirm both hybrid formations and also their individual components. Current-Voltage (I–V) measurements on the hybrid nanostructures exhibited bistable current levels towards the memory function device, that and those characteristics were unnoticeable on individual nanomaterials. The hybrids showed good retention characteristics with high stability and durability, which is a promising feature for future nanoscale memory devices.
Highlights
IntroductionAzurin, which is a blue copper redox protein, plays a key role in transporting the electrons in many important biological reactions, such as photosynthesis, and in bacterial respiratory redox-chains [1,2]
Azurin, which is a blue copper redox protein, plays a key role in transporting the electrons in many important biological reactions, such as photosynthesis, and in bacterial respiratory redox-chains [1,2].The electron transfer process occurs through the copper-containing active site, which is characterized by an intense ligand-to-metal charge transfer absorption band located around 628 nm [3]
The present study demonstrated an easy and robust method for hybrid formation and characterized the electrical resistive properties along with memory effects observed in azurin/CdSe-ZnS bio-nano hybrid on an Au electrode
Summary
Azurin, which is a blue copper redox protein, plays a key role in transporting the electrons in many important biological reactions, such as photosynthesis, and in bacterial respiratory redox-chains [1,2]. The electron transfer process occurs through the copper-containing active site, which is characterized by an intense ligand-to-metal charge transfer absorption band located around 628 nm [3]. The utilization of metallic and semiconductor nanoparticles (NPs) has gained much importance in various fields such as electrocatalysis, and as a biological marker in disease diagnostics [6]. Due to size-dependant electronic properties [7], NPs have gained much technological importance, making the material important in many aspects of study in molecular electronics [8] and biomedical engineering [9].
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