Hall transport of divalent metal ion modified DNA lattices

Abstract

We investigate the Hall transport characteristics of double-crossover divalent metal ion (Cu2+, Ni2+, Zn2+, and Co2+)-modified DNA (M-DNA) lattices grown on silica via substrate-assisted growth. The electronic characteristics of the M-DNA lattices are investigated by varying the concentration of the metal ions and then conducting Hall measurements, including resistivity, Hall mobility, carrier concentration, and magneto resistance. The tendency of the resistivity and Hall mobility was to initially decrease as the ion concentration increased, until reaching the saturation concentration (Cs) of each metal ion, and then to increase as the ion concentration increased further. On the other hand, the carrier concentration revealed the opposite tendency as the resistivity and Hall mobility. The specific binding (≤Cs) and the nonspecific aggregates (>Cs) of the ions into the DNA lattices were significantly affected by the Hall characteristics. The numerical ranges of the Hall parameters revealed that the M-DNA lattices with metal ions had semiconductor-like characteristics. Consequently, the distinct characteristics of the electrical transport through M-DNA lattices will provide useful information on the practical use of such structures in physical devices and chemical sensors.

Electronic Characterization of Au/DNA/ITO Metal-Semiconductor-Metal Diode and Its Application as a Radiation Sensor

“…From Fig 3 , the deep valley demonstrates non-zero current at 0 V for the samples with an offset-shift in the negative direction up to 0.2 and 0.8 V for the 0.036 and 0.18 Gy, respectively. It might be attributed to the alpha particle charge or dose (storage, trapping, and de-trapping of the charge carriers) agreeing with Dugasani et al [ 30 ] and with Reddy et al in terms of the creation of reverse molecule charge interaction between DNA and the metal [ 43 ].…”

“…Recently, Dugasani et al observed that the resistivity tendency and Hall mobility declined when the ion concentration was raised while reaching the saturation concentration (C s ) of each metal ion, thereby increasing the ion concentration. Also, they numerically discovered that the metal-DNA lattice behaved as a semiconductor with metal ions through the Hall parameters [ 30 ]. In this current work, we report the study of the current transport characteristics of Au/DNA/ITO Schottky diodes exposed to alpha radiation between 0–0.24 Gy.…”

DNA structures embedded with functionalized nanomaterials for biophysical applications

“…DNA can be easily incorporated with nanomaterials possessing their own intrinsic characteristics. Such nanomaterial-embedded DNA hybrid complexes perform specific functions with potential applicability to biosensors and nanoelectronics [83][84][85][86][87][88].…”

Large-Scale Fabrication of Copper-Ion-Coated Deoxyribonucleic Acid Hybrid Fibers by Ion Exchange and Self-Metallization

“…Among the various nanomaterials such as ions, nanoparticles, carbon-based materials, and proteins, metal ions (e.g., Cu 2+ ) exhibit promising electrical, optical, and magnetic characteristics, which can be helpful in enhancing the DNA characteristics. Although thin films of metal-doped and lanthanide-ion-doped DNA duplexes have been fabricated, hybrid fibers of CDNA metallized with ions synthesized in a large-scale production in a powder form have been rarely discussed. − Metal (e.g., Ag, Au, and Pd)-coated DNA nanowires fabricated by chemically derivatized and seeding growth methods were reported; however, the DNA metallization method was complex and the mass production of samples with a high quality was quite limited. − CDNA fibers metallized with Cu 2+ are formed as core (CDNA)–shell (Cu 2+ ) structures by self-metallization, which can easily alter the electrical, optical, and magnetic characteristics of the samples.…”