Anatomizing Quantum Transport in Molecular Junctions with Cyanide and its Isomer as Anchors
Rupan Preet Kaur1, Ravinder Singh Sawhney2, Harpinder Kaur3
1Rupan Preet Kaur, Department of Electronics Technology, Guru Nanak Dev University, Amritsar, India.
2Ravinder Singh Sawhney, Department of Electronics Technology, Guru Nanak Dev University, Amritsar, India.
3Harpinder Kaur, Department of Electronics Technology, Guru Nanak Dev University, Amritsar, India.
Manuscript received on July 22, 2013. | Revised Manuscript received on August 09, 2013. | Manuscript published on August 30, 2013. | PP: 96-100 | Volume-2, Issue-6, August 2013. | Retrieval Number: F1982082613/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The electrical properties of SAMs on gold surface with different alligator clips at each ends were explored for an anthracene molecule. We probed charge transport characteristics of anthracene with two different anchor groups Cyanide and its isomer Isocyanide attached to anthracene at each side and sandwiched between two gold electrodes. Through I-V Curves, conductance-voltage curves, differential conductance-voltage curves and transmission spectrum, we found that anthracene-cyanol-isocyanol (ACI) exhibited highest current, conductance and transmissions whereas anthracene disocyanol (ADC) exhibited least current, conductance and transmissions. This highest conduction of ACI was on account of very strong bonding between gold electrodes and corresponding –CN anchor group whereas lowest conduction of ADC was because of weaker bonding between gold electrodes and –NC anchor group. The conduction exhibited by gold-CN bond and gold-S bond was found to be similar hence concluding that both these bonds (Au-CN and Au-S) have approximately similar strength.
Keywords: Nanoscale, Alligator Clips, HOMO, LUMO, Isomer.