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. Author manuscript; available in PMC: 2011 Feb 10.
Published in final edited form as: Nano Lett. 2010 Feb 10;10(2):547. doi: 10.1021/nl9034219

Table 1.

Estimated surface charge detection limit ΔQmin= C×Δϕmin (in units of elementary electron charge, e) per μm-long SiNW FET sensor in 10 mM or 10 μM buffers.

Minimum detectable charges Linear regime
ΔQmin ∼ (Cox+CDL)×Δϕmin 		Subthreshold regime
ΔQmin ∼ CDL×Δϕmin
ΔQmin/μm at I = 10 mM 200 e 20 e
ΔQmin/μm at I = 10 μM 70 e 3 e