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Screening-Limited Response of NanoBiosensors
Open accessAbstract
Despite tremendous potential of highly sensitive electronic detection of biomolecules by nanoscale biosensors for genomics and proteomic applications, many aspects of experimentally observed sensor response (S) are difficult to understand within isolated theoretical frameworks of kinetic response or electrolyte screening. In this paper, we combine analytic solutions of Poisson-Boltzmann and diffusion-capture equations to show that the electrostatic screening within an ionic environment limits the response of nanobiosensor such that S(t) approximately c1(ln(rho0) - ln(I0)/2 + ln(t)/ D F + c2[pH]) + c3 where c i are geometry-dependent constants, rho0 is the concentration of target molecules, I0 the salt concentration, and D F the fractal dimension of sensor surface. Our analysis provides a coherent theoretical interpretation of a wide variety of puzzling experimental data that have so far defied intuitive explanation.
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Cites
Label-free immunodetection with CMOS-compatible semiconducting nanowires
Stern, E., Klemic, J. F., Routenberg, D. A., Wyrembak, P. N., Turner-Evans, D. B., Hamilton, A. D., LaVan, D. A., Fahmy, T. M., & Reed, M. A. (2007) · Nature · doi:10.1038/nature05498 · Cited by 1,352
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Nernst Limit in Dual-Gated Si-Nanowire FET Sensors
Knopfmacher, O., Tarasov, A., Fu, W., Wipf, M., Niesen, B., Calame, M., & Schönenberger, C. (2010) · Nano Letters · doi:10.1021/nl100892y · Cited by 353
Two-dimensional Layered MoS2 Biosensors Enable Highly Sensitive Detection of Biomolecules
Lee, J., Dak, P., Lee, Y., Park, H., Choi, W., Alam, M. A., & Kim, S. (2014) · Scientific Reports · doi:10.1038/srep07352 · Cited by 318
Self-citationGraphene nanoelectronic heterodyne sensor for rapid and sensitive vapour detection
Kulkarni, G. S., Reddy, K., Zhong, Z., & Fan, X. (2014) · Nature Communications · doi:10.1038/ncomms5376 · Cited by 189
Effect of Nanowire Number, Diameter, and Doping Density on Nano-FET Biosensor Sensitivity
Li, J., Zhang, Y., To, S., You, L., & Sun, Y. (2011) · ACS Nano · doi:10.1021/nn202182p · Cited by 138
Metadata
- Authors
- Nair, P. R., & Alam, M. A.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-04-03
- Volume
- 8
- Issue
- 5
- Pages
- 1281-1285
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2094693115
- Cited by
- 227
- References
- 1
- FWCI
- 7.44
- Type
- journal article
- Language
- en
- Open access
- green
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