DNA Scaffolds with Manganese Oxide/Oxyhydroxide Nanoparticles for Highly Stable Supercapacitance Electrodes

Abstract

The utilization of manganese oxides/oxyhydroxides as efficient supercapacitor electrode materials is limited by their cyclic stability and thus restricted for practical applications. One attractive approach for improving their stable electrochemical performance is to form a hybrid with suitable support materials. Herein, we describe the fabrication of manganese oxide/oxyhydroxide nanoparticle (MONP)embedded deoxyribonucleic acid (DNA) scaffolds using a simple magnetic stirring and drop-casting method. The physical and chemical property measurements provided information regarding the interactions of the MONPs with the DNA in the scaffolds. Further, these materials' electrical properties were studied by looking at the MONP concentration-dependent current characteristics. Our testing shows a monotonic increase in current with increasing MONP concentration. The supercapacitance activity of MONP-embedded DNA scaffolds with various MONP concentrations was explored using cyclic voltammetry (CV) and galvanostatic charge−discharge (GCD) measurements. From the electrochemical studies conducted, it was found that the supercapacitance values achieved while using scaffolds decreased up to a certain concentration of MONPs and then increased thereafter. The DNA scaffolds with a 0.5 weight percentage (wt %) of MONPs achieved ∼60% of the specific capacitance value of pristine MONPs. Long-term cyclic stability studies showed that using pristine MONPs, DNA, and MONP-embedded DNA scaffolds led to the supercapacitor samples retaining 71.9, 104.6, and 108.8%, respectively, of their initial specific capacitance values after 10 000 cycles at a current density of 5 A g −1 . The excellent cyclic stability of the devices with DNAbased scaffolds proves that DNA acts as a strong support material and helps to solve one of the major drawbacks of manganese-based supercapacitance electrode materials. This unique approach of utilizing DNA as a stable support material can be extended to numerous other materials to achieve better cyclic stability and can be used for a wide range of electrochemical applications.

Research progress of multi-enzyme complexes based on the design of scaffold protein

“…The ability of DNA to self-assemble nanostructures, along with the accuracy of nanoparticle localization on DNA scaffolds, presents a potential strategy for the self-organization of composite nanostructures (Winfree et al 1998 ; Park et al 2008b ; Li et al 2018 ; Nakata et al 2019 ; Komarala et al 2022 ). Muller et al reported for the first time on the production of heterodimerase complexes of Glucose Oxidase (GOX) or Horseradish peroxidase (HRP) through DNA-directed assembly of enzyme oligonucleotide conjugates.…”

Ultrafast Synthesis of Graphene‐Embedded Cyclodextrin‐Metal‐Organic Framework for Supramolecular Selective Absorbency and Supercapacitor Performance

“…[ 2 ] The research on supercapacitors has greatly promoted the development of new intelligent devices. [ 3 ] Namely, double‐layer capacitors, known for their fast and stable energy storage performance as well as environmentally friendly properties, have been widely studied by researchers. [ 4 ] Additionally, metal‐organic frameworks (MOFs) are one of the most popular electrode materials because of their large pores, flexible preparation methods, and controllable structures.…”

Electrical contact effects of flexible self-supporting DNA thin films for storage devices

“…Deoxyribonucleic acid (DNA) has been the primary material of interest due to its distinct properties, including high dielectric constant, large bandgap and high transparency. Pristine DNA(D) and cetyltrimethylammonium chloride (CTMA) surfactant-modified DNA (CD) can extend utility in inorganic-and organic-based devices and sensor applications [6][7][8][9][10]. Furthermore, DNA can be utilized as an efficient template for hosting drugs, dyes, ions and nanoparticles for enhancing functionality [11][12][13][14][15].…”