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Abstrak :
ABSTRAK
Kami mempelajari sifat transport muatan menggunakan molekul DNA aperiodik dan molekul DNA G4. Molekul DNA aperiodik mempelajari pengaruh nilai loncatan inter-strand pada karakteristik I-V. Molekul DNA G4 mempelajari pengaruh medan listrik dan medan magnet pada panjang lokalisasi, density of state DOS , dan karakteristik I-V. Sifat transport muatan dipelajari dengan menghitung probabilitas transmisi, karakteristik I-V, dan memberikan pengaruh medan listrik dan medan magnet. Pada molekul DNA aperiodik, dipelajari pengaruh nilai hopping inter-strand terhadap probabilitas transmisi dan karakteristik I-V. Probabilitas transmisi dihitung dengan metode transfer matriks, sedangkan karakteristik I-V dihitung dengan formula Launder-Buttiker. Pada molekul DNA G4, dipelajari pengaruh medan listrik dan medan magnet terhadap panjang lokalisasi, density of state DOS, dan karakteristik I-V. Panjang lokalisasi dihitung menggunakan metode transfer matriks, dan density of state DOS serta karakteristik I-V dihitung dengan metode fungsi Green.

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ABSTRACT
The charge transport of aperiodic DNA and G4 DNA molecule have been studied. On the aperiodic DNA molecule, the effect of the inter-strand hopping value on the I-V characteristic has been studied. The effect of the electric and magnetic field on the localization length, density of state (DOS), and I-V characteristics were studied G4 DNA molecule. Charge transport was studied by calculating the transmission probability, the I-V characteristic, by considering the effect of the electric and the magnetic field. In the aperiodic DNA molecule, we study the effect of hopping inter-strand on transmission probability and I-V characteristics. The transmission probability was calculated by the matrix transfer method, while the I-V characteristic was calculated by the Launder-Buttiker formula. In G4 DNA molecule, we studied the effect of the electric and magnetic field on the localization length, density of state (DOS), and I-V characteristic. Localization length was calculated using matrix transfer method, and density of state (DOS) and I-V characteristic was calculated by Green function method.

Abstrak :
Sifat transpor muatan pada molekul DNA untai ganda dan DNA G4 telah dipelajari. Kami menggunakan dua model DNA yang direpresentasikan secara matematis dengan menggunakan model Hamiltonian tight binding. Model yang pertama adalah DNA untai ganda dengan panjang 32 pasangan basa yang disusun secara random. Transpor muatan untuk molekul DNA ini dipelajari dari probabilitas transmisi dan karakteristik I-V dengan memvariasikan hopping elektron inter-strand tegak lurus. Peningkatan hopping electron inter-strand tegak lurus menyebabkan probabilitas transmisi dan arus meningkat, tetapi saat temperaturnya dinaikkan probabilitas transmisi dan arus menurun. Model kedua adalah DNA G4, Sifat transpor muatan pada molekul ini dipelajari dari panjang lokalisasi dengan panjang 102 pasangan basa, density of states dan karakteristik I-V masing-masing dengan 32 tumpukan tetrad guanin, yang diberi pengaruh medan listrik dan temperatur, Probabilitas transmisi dan panjang lokalisasi dihitung menggunakan metode transfer matriks. Formula landauer Buttiker digunakan untuk menghitung karakteristik I-V. Metode fungsi green untuk menghitung probabilitas transmisi dan density of states. Hasil perhitungan medan listrik dan temperatur terhadap sifat transpor muatan yaitu menurunkan panjang lokalisasi, density of states, dan arus, saat meningkatnya medan listrik dan temperatur. ...... The charge transport property on double-stranded DNA and G4 DNA molecules has been studied. We use two DNA models that are mathematically represented using Hamiltonian tight binding models. The first model is double stranded DNA with length of 32 base pairs arranged randomly. The charge transport for this DNA molecule is studied from transmission probabilities and I-V characteristics by varying of electron hopping in perpendicular inter-strand. Increased of electron hopping in perpendicular inter-strand causes the transmission and current probabilities to increase, but when temperature is increased the transmission probabilities and current is decrease. The second model is DNA G4. The charge transport property in this molecule is studied from localization length with length of 102 base pairs, density of states and I-V characteristics with 32 stacks of guanine tetrads respectively that influenced of electric field and temperature. Transmission probability and localization length are calculated using matrix transfer method. The buttiker landauer formula is used to calculate the I-V characteristics. Green function method for calculating transmission probability and density of states. The result of electric field and temperature calculation on charge transport leads to decreasing localization length, density of states, and current, when increasing of electric field and temperature.