Optoelectric and photocatalytic characteristics of DNA thin films embedded with transition metal ion-doped ZnO nanorods

Kokkiligadda, Samanth; Raut, Suyog A.; Mariyappan, Karthikeyan; Nam, Yeonju; Kesama, Mallikarjuna Reddy; Mathe, V. L.; Bhoraskar, S. V.; Park, Sungha

doi:10.1016/j.matchemphys.2022.126135

Cited by 5 publications

(2 citation statements)

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“…Conventional DNA peaks from phosphate backbone, nucleobases, and OH stretching were observed similar to the previous reports (detail band assignments shown in Table S1, Supporting Information). [ 39–41 ] On the other hand, high MoS 2 concentration in the 0.3 wt% sample exhibited the highest reflectance (≈18.1% at 398 nm) among others (≈16.6% in 0.4 wt%, ≈15.7% in 0.2 wt%, ≈14.2% in 0.1 wt%), suggesting high MoS 2 concentration in the 0.3 wt% sample as shown in Figure 4d.…”

Section: Resultsmentioning

confidence: 93%

Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite

Kokkiligadda,

Mondal,

et al. 2024

Advanced Materials

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A nano‐biocomposite film with ultrahigh photoconductivity remains elusive and critical for bio‐optoelectronic applications. A uniform, well‐connected, high‐concentration nanomaterial network in the biological matrix remains challenging to achieve high photoconductivity. Wafer‐scale continuous nano‐biocomposite film without surface deformations and cracks play another major obstacle. Here we observed ultrahigh photoconductivity in DNA‐MoS2 nano‐biocomposite film by incorporating a high‐concentration, well‐percolated, and uniform MoS2 network in the ss‐DNA matrix. This was achieved by utilizing DNA‐MoS2 hydrogel formation, which resulted in crack‐free, wafer‐scale DNA‐MoS2 nano‐biocomposite films. Ultra‐high photocurrent (5.5 mA at 1 V) with a record‐high on/off ratio (1.3×106) was observed, five orders of magnitude higher than conventional biomaterials (∼101) reported so far. The incorporation of the Wely semimetal (Bismuth) as an electrical contact exhibited ultrahigh photoresponsivity (2.6×105 A/W). Such high photoconductivity in DNA‐MoS2 nano‐biocomposite could bridge the gap between biology, electronics, and optics for innovative biomedicine, bioengineering, and neuroscience applications.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 93%

Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite

Kokkiligadda,

Mondal,

et al. 2024

Advanced Materials

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Kokkiligadda¹,

Kesama²,

Jeon³

et al. 2023

J. Phys. D: Appl. Phys.

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The development of flexible DNA thin films embedded with diverse functional nanomaterials might be beneficial for electronic devices and biosensors. In this work, we fabricated two different methods of electrodes (i.e., metal paste spotted electrodes and metal layer electrodes) on flexible drug- and dye-embedded DNA thin films to examine the electrical and capacitance properties for conduction and energy storage, respectively. Enhanced current and reduced capacitance of drug-embedded DNA thin films compared to pristine DNA with Ag paste electrodes were observed due to the intrinsic characteristics of the drugs. We introduced the e-beam deposition process for fabricating relatively large area metal (such as Au and Al) coated electrodes, which ensures the creation of metal layers on both sides of the flexible thin films while improving metal contact. There was a significant current increase in DNA thin films with metal layer electrodes compared to DNA thin films with Ag paste electrodes. Furthermore, capacitances measured from Au/Dg/Au and Al/Dg/Al capacitors were relatively more stable than Ag paste DNA thin films. The physical properties of our samples might easily be controlled by manipulating functional nanomaterials in DNA thin films and various types of metal layer electrodes. Our self-supporting DNA thin films with integrated nanomaterials and durable metal layer electrodes might be employed in flexible electronic devices such as nanogenerators, skin electronics, and biosensors in the future.

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State-of-the-art review on photocatalysis for efficient wastewater treatment: Attractive approach in photocatalyst design and parameters affecting the photocatalytic degradation

Lee,

Kim,

Danish

et al. 2023

Catalysis Communications

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Optoelectric and photocatalytic characteristics of DNA thin films embedded with transition metal ion-doped ZnO nanorods

Cited by 5 publications

References 45 publications

Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite

Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite

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

State-of-the-art review on photocatalysis for efficient wastewater treatment: Attractive approach in photocatalyst design and parameters affecting the photocatalytic degradation

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Optoelectric and photocatalytic characteristics of DNA thin films embedded with transition metal ion-doped ZnO nanorods

Cited by 5 publications

References 45 publications

Observation of Ultrahigh Photoconductivity in DNA‐MoS2 Nano‐Biocomposite

Observation of Ultrahigh Photoconductivity in DNA‐MoS2 Nano‐Biocomposite

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

State-of-the-art review on photocatalysis for efficient wastewater treatment: Attractive approach in photocatalyst design and parameters affecting the photocatalytic degradation

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Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite

Observation of Ultrahigh Photoconductivity in DNA‐MoS₂ Nano‐Biocomposite