Bandgap Manipulation is very important for various applications. Optical Devices need smaller Bandgap where as Diode's need larger Bandgap. Armchair graphene Nanoribbon (AGNR) has a special property where if the numbers of atoms are multiple of three or multiple of three plus one, they are semi metallic where as if the atoms are multiple of three plus two, it is Metallic that is band gap is zero. Here, it is shown that adding antidote can affect the Bandgap and Transport properties of material. I have used 11-AGNR and 9-AGNR to show that by adding antidotes the Bandgap can be increased or decreased to convert it from metallic to semi metallic. By doing this a significant change has been observed in the Current-Voltage characteristics of the devices where a negative resistance region is obtained which can be exploited in many applications. To simulate the structure, Tight-binding model and Non equilibrium Green's function method is used. The simulation was performed on MATLAB

I am a student presently pursuing Bachelors in Electronics Engineering. I am highly research oriented and I want to pursue my career in Nanoelectronics especially in studying properties of carbon materials and structures. My interests also include studying the quantum transport and effect of coulomb blockade on quantum transport in different regimes. 

I avail this opportunity to express my indebtedness to Mr. Milad Zoghi. Mr. Milad’s lectures on nanotechnology on Udemy (Udemy.com) helped me to understand and implement these concepts myself. I was very inspired by Mr. Milad’s educational videos.

1. A. Yazdanpanah Goharrizi, M. Zoghi and M. Saremi, "Armchair Graphene Nanoribbon Resonant Tunneling Diodes Using Antidote and BN Doping," in IEEE Transactions on Electron Devices, vol. 63, no. 9, pp. 3761-3768, Sept. 2016, doi: 10.1109/TED.2016.2586459.
2. Datta, "The NEGF method: capabilities and challenges," 2004 Abstracts 10th International Workshop on Computational Electronics, West Lafayette, IN, USA, 2004, pp. 61-62, doi: 10.1109/IWCE.2004.1407323.
3. S. Datta, "Non-equilibrium green's function (NEGF) method: a different perspective," 2015 International Workshop on Computational Electronics (IWCE), West Lafayette, IN, 2015, pp. 1-6, doi: 10.1109/IWCE.2015.7301951.
4. [Online]: https://www.sciencedirect.com/topics/chemistry/tight-binding-method
5. Zoghi, M., Goharrizi, A.Y. & Saremi, M. Band Gap Tuning of Armchair Graphene Nanoribbons by Using Antidotes. Journal of Elec Materi 46, 340–346 (2017). https://doi.org/10.1007/s11664-016-4940-4
6. https://www.sciencedirect.com/topics/engineering/negative-differential-resistance

Researchers should cite this work as follows:

• Lance Fernandes (2020), "Bandgap Manipulation of Armchair Graphene nanoribbon," https://nanohub.org/resources/34094.

  BibTex | EndNote

1. bandgap
2. graphene
3. nanoelectronics
4. nanoribbons
5. NEGF
6. Simulation
7. tight-binding
8. undergraduate research