Programmable redox state of the nickel ion chain in DNA.
DNA is a nanowire in nature which chelates Ni ions and forms a conducting chain in its base-pairs (Ni-DNA). Each Ni ion in Ni-DNA exhibits low (Ni(2+)) or high (Ni(3+)) oxidation state and can be switched sequentially by applying bias voltage with different polarities and writing times. The ratio of low and high oxidation states of Ni ions in Ni-DNA represents a programmable multistate memory system with an added capacitive component, in which multistate information can be written, read, and erased. This study also indicates that the biomolecule-based self-organized nanostructure can be used as a template for nanodevice fabrication.
Department of Biological Science and Technology, National Chiao Tung University , 75 Bo Ai Street, Hsinchu, Taiwan , 30068.
Hsueh-Liang
HL
Chu
Shao-Chien
SC
Chiu
Ching-Feng
CF
Sung
Wellen
W
Tseng
Yu-Chuan
YC
Chang
Wen-Bin
WB
Jian
Yu-Chang
YC
Chen
Chiun-Jye
CJ
Yuan
Hsing-Yuan
HY
Li
Frank X
FX
Gu
Massimiliano
M
Di Ventra
Chia-Ching
CC
Chang
D004247:DNA / Q000737:chemistry* / Q000648:ultrastructure; D004553:Electric Conductivity; D017097:Electric Impedance; D004566:Electrodes; D007477:Ions; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry
D007477:Ions; D009532:Nickel; D004247:DNA; D010100:Oxygen