Thickness, morphology, and optoelectronic characteristics of pristine and surfactant-modified DNA thin films

Arasu, Velu; Dugasani, Sreekantha Reddy; Son, Jae Sung; Gnapareddy, Bramaramba; Jeon, Sohee; Jeong, Jun‐Ho; Park, Sungha

doi:10.1088/1361-6463/aa8795

Cited by 14 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FTIR absorbance of CDNA clearly showed characteristic peaks for sugar, phosphate groups (1250-600 cm À1 ), and nucleotide bases (1800-1300 cm À1 ); detailed mode assignments are shown in our previous report. 24 As expected, D ligands formed a stronger bond on the QD surface because they had more free electrons (about 2 times) than T. The optical properties of QDs with different ligands were found to be different due to the degree of surface passivation and dispersion in liquid and solid media. The PLQY of QD T and QD TD in the liquid phase and of QD T -CDNA and QD TD -CDNA in the solid phase is shown in Fig.…”

Section: Ligand-dependent Plqy Characteristics Of Individual R G Ansupporting

confidence: 53%

“…Deoxyribonucleic acid (DNA) molecules, which have intrinsic optical characteristics (e.g., wide optical bandgap) and molecular recognition, provide a rigid platform for hosting various functional nanomaterials. [22][23][24][25] Owing to the high aspect ratio and helical structure of DNA, it can provide more room for embedding luminophores with less agglomeration. 26 In addition, DNA is advantageous for bio-optoelectronic applications with QD luminophores because of its biocompatible nature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Configuration- and concentration-dependent hybrid white light generation using red, green, and blue quantum dots embedded in DNA thin films

Arasu

Chae

et al. 2019

Nanoscale Adv.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Ligand-dependent Plqy Characteristics Of Individual R G Ansupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Configuration- and concentration-dependent hybrid white light generation using red, green, and blue quantum dots embedded in DNA thin films

Arasu

Chae

et al. 2019

Nanoscale Adv.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For C – V measurement, a DNA+NP thin layer placed on an indium tin oxide (ITO)-coated glass substrate (called the C – V device) is constructed. The average thicknesses of the DNA+NP and CDNA+NP layers are roughly 2 μm Figure b shows the absorbance spectra.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic and Capacitance Characteristics of DNA Thin Layers Embedded with Semiconducting ZnO and CuO Nanoparticles

Kesama

Dugasani

Gnapareddy

et al. 2019

ACS Appl. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

Advances in semiconductor metal oxide nanoparticles (NPs), such as ZnO and CuO NPs, have allowed the construction of novel and efficient optoelectronic devices and sensors. Deoxyribonucleic acid (DNA) molecules, which are among the most versatile biomaterials, have proven to be a useful template for arranging and decorating nanomaterials, significantly enhancing their specific functionalities. In this study, we fabricated p-type ZnO and n-type CuO NP-embedded DNA thin layers via a facile drop-casting method. Additionally, cetyltrimethylammonium surfactant-modified DNA (CDNA) thin layers with semiconducting NPs were constructed to expand the usability in an organic solvent. Optical and electrical characterizations of the ZnO and CuO NP-embedded DNA and CDNA thin layers are essential. Thus, DNA and CDNA thin layers with various concentrations of ZnO and CuO NPs were characterized via X-ray diffraction (XRD) spectroscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmittance and absorption spectroscopy, and photoluminescence spectroscopy. These measurements provided crucial information regarding the complexes, such as the chemical composition, binding modes, and energy transition. In the XRD spectra, we observed that the d-spacing of the DNA duplexes and the crystalline phase of the NPs did not change in the complex, indicating that there was no alteration of the structural characteristics of the materials. The bandgap energies4.16 eV for pristine DNA and 3.89 eV for CuO NP-embedded DNAwere estimated according to the absorption spectra. Moreover, the current and dielectric constant of the ZnO and CuO NP-embedded DNA and CDNA thin layers were measured for investigating the basic electrical characteristics of the samples, which were explained in detail according to the energy-band diagram. The specificity of the optoelectronic characteristics of NP-embedded DNA and CDNA thin layers controlled by [NP] can be utilized in various functional optoelectronic devices and sensors.

show abstract

“…After incubating V 3+ in the DNA solution, 20 μl of the sample solution was drop-cast on O 2 plasma-treated fused silica (for absorbance and Raman measurements), glass (energy dispersive x-ray spectroscopy (EDS), x-ray photoelectron spectroscopy (XPS), current, and magnetization), and indium tin oxide (ITO)-coated glass (capacitance) and allowed to dry naturally. The final thickness of V 3+ -doped DNA layers was 1.5 μm [33] (figure 1).…”

Section: Fabrication Of V 3+ -Doped Dna Layersmentioning

confidence: 99%

Band gap, dielectric constant, and susceptibility of DNA layers as controlled by vanadium ion concentration

Kesama¹,

Dugasani²,

Jung³

et al. 2019

Nanotechnology

View full text Add to dashboard Cite

Deoxyribonucleic acid (DNA) doped with transition metal ions shows great versatility for molecular-based biosensors and bioelectronics. Methodologies for developing DNA lattices (formed by synthetic double-crossover tiles) and DNA layers (used by natural salmon) doped with vanadium ions (V3+), as well as an understanding of the physical characteristics of V3+-doped DNA nanostructures, are essential in practical applications in interdisciplinary research fields. Here, DNA lattices and layers doped with V3+ are constructed through substrate-assisted growth and drop-casting methods. In addition, enhanced physical characteristics such as the band gap energy, work function, dielectric constant, and susceptibility of V3+-doped DNA nanostructures with varying V3+ concentration ([V3+]) are investigated. The critical concentration ([V3+]C) at a given amount of DNA was predicted based on an analysis of the phase transition of DNA lattices from crystalline to amorphous with specific [V3+]. Generally, the [V3+]C provided crucial information on the structural stability and extremum physical characteristics of V3+-doped DNA nanostructures due to the optimum incorporation of V3+ into DNA. We obtained the optical absorption spectra for energy band gap estimation; Raman spectra for identifying the preferential coordination sites of V3+ in DNA; x-ray photoelectron spectra to examine the chemical state, chemical composition, and functional groups; and ultraviolet photoelectron spectra to estimate the work function. In addition, we addressed the electrical properties (i.e. current, capacitance, dielectric constant, and storage energy) and magnetic properties (magnetic field-dependent and temperature-dependent magnetizations and susceptibility) of DNA layers in the presence of V3+. The development of biocompatible materials with specific optical, electrical, and magnetic properties is required for future applications because they must have designated functionality, high efficiency, and affordability.

show abstract

Thickness, morphology, and optoelectronic characteristics of pristine and surfactant-modified DNA thin films

Cited by 14 publications

References 40 publications

Configuration- and concentration-dependent hybrid white light generation using red, green, and blue quantum dots embedded in DNA thin films

Configuration- and concentration-dependent hybrid white light generation using red, green, and blue quantum dots embedded in DNA thin films

Spectroscopic and Capacitance Characteristics of DNA Thin Layers Embedded with Semiconducting ZnO and CuO Nanoparticles

Band gap, dielectric constant, and susceptibility of DNA layers as controlled by vanadium ion concentration

Contact Info

Product

Resources

About