Tags

Type your tag names separated by a space and hit enter

Optimal in situ electromechanical sensing of molecular species.
J Chem Phys 2020; 152(3):034109JC

Abstract

We investigate protocols for optimal molecular detection with electromechanical nanoscale sensors under ambient conditions. Our models are representative of suspended graphene nanoribbons, which due to their piezoelectric and electronic properties provide responsive and versatile sensors. In particular, we analytically account for the corrections in the electronic transmission function and signal-to-noise ratio originating in environmental perturbations, such as thermal fluctuations and solvation effects. We also investigate the role of the sampling time in the current statistics. As a result, we formulate a protocol for optimal sensing based on the modulation of the Fermi level at a fixed bias and provide approximate forms for the current, linear susceptibility, and current fluctuations. We show how the algebraic tails in the thermally broadened transmission function affect the behavior of the signal-to-noise ratio and optimal sensing. These results provide further insights into the operation of graphene deflectometers and other techniques for electromechanical sensing.

Authors+Show Affiliations

Biophysics Group, Microsystems and Nanotechnology Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.Biophysics Group, Microsystems and Nanotechnology Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31968951

Citation

Ochoa, Maicol A., and Michael Zwolak. "Optimal in Situ Electromechanical Sensing of Molecular Species." The Journal of Chemical Physics, vol. 152, no. 3, 2020, p. 034109.
Ochoa MA, Zwolak M. Optimal in situ electromechanical sensing of molecular species. J Chem Phys. 2020;152(3):034109.
Ochoa, M. A., & Zwolak, M. (2020). Optimal in situ electromechanical sensing of molecular species. The Journal of Chemical Physics, 152(3), p. 034109. doi:10.1063/1.5132581.
Ochoa MA, Zwolak M. Optimal in Situ Electromechanical Sensing of Molecular Species. J Chem Phys. 2020 Jan 21;152(3):034109. PubMed PMID: 31968951.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Optimal in situ electromechanical sensing of molecular species. AU - Ochoa,Maicol A, AU - Zwolak,Michael, PY - 2020/1/24/entrez PY - 2020/1/24/pubmed PY - 2020/1/24/medline SP - 034109 EP - 034109 JF - The Journal of chemical physics JO - J Chem Phys VL - 152 IS - 3 N2 - We investigate protocols for optimal molecular detection with electromechanical nanoscale sensors under ambient conditions. Our models are representative of suspended graphene nanoribbons, which due to their piezoelectric and electronic properties provide responsive and versatile sensors. In particular, we analytically account for the corrections in the electronic transmission function and signal-to-noise ratio originating in environmental perturbations, such as thermal fluctuations and solvation effects. We also investigate the role of the sampling time in the current statistics. As a result, we formulate a protocol for optimal sensing based on the modulation of the Fermi level at a fixed bias and provide approximate forms for the current, linear susceptibility, and current fluctuations. We show how the algebraic tails in the thermally broadened transmission function affect the behavior of the signal-to-noise ratio and optimal sensing. These results provide further insights into the operation of graphene deflectometers and other techniques for electromechanical sensing. SN - 1089-7690 UR - https://www.unboundmedicine.com/medline/citation/31968951/Optimal_in_situ_electromechanical_sensing_of_molecular_species L2 - https://dx.doi.org/10.1063/1.5132581 DB - PRIME DP - Unbound Medicine ER -