Table 4.

Qualitative Assessment of Microchip Performance

	Analytical Parameters			Fabrication Procedure			Remarks
	Sensitivity1	Limit of Detection2	Noise3	Process	Cost	Use of Hazardous Chemicals4
PPF End - Channel	Best	Best	Low	Simplest	Moderate	No	Requires fused silica substrate; high temperature furnace
Carbon Fiber End - Channel	Good	Fair	Fair	Simple	Inexpensive	No	Requires skill to embed carbon fiber into PDMS substrate
Palladium End - Channel	Good	Fair	High	Complex	Expensive	Yes	Deposition system required; use of expensive or rare metals
Palladium Off - Channel	Poor	Fair	Fair	Complex	Expensive	Yes	Deposition system required; use of expensive or rare metals
Carbon Ink Off - Channel	Fair	Good	Lowest	Simple	Inexpensive	Yes	Electrode size is limited by PDMS aspect ratio; thick films can be highly resistive
Carbon Ink End - Channel	Poor	Fair	Lowest	Simple	Inexpensive	No	Electrode size is limited by PDMS aspect ratio; thick films can be highly resistive

¹Slope of the calibration curve

²Calculated for S/N=3

³Based on average peak-to-peak baseline noise

⁴Use of HF and/or aqua regia solutions