. Author manuscript; available in PMC: 2011 Mar 1.

Published in final edited form as: Anal Chem. 2010 Mar 1;82(5):1659–1668. doi: 10.1021/ac901066p

Table 2.

Amplification factors (A_f) and collection efficiencies (C_e) obtained by redox cycling between generator and collector electrodes (Ng/Nc) at various scan rates in the open (top) and closed (bottom) microchannel.

Open microchannel
# gen./# coll.	0.001 V/s		0.010 V/s		0.050 V/s		0.100 V/s		0.500 V/s		1.000 V/s

	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%
1g/1c	1.13	21.1	1.05	33.7	1.00	20.3	0.99	13.2	1.01	---	1.00	---
1g/2c	1.19	54.1	1.10	54.8	1.00	36.4	0.96	24.9	1.00	---	1.00	---
1g/4c	1.20	61.7	1.17	56.7	1.02	37.0	1.00	24.8	1.01	---	1.01	---
1g/6c	1.24	64.1	1.14	58.1	1.03	35.8	1.01	23.3	1.02	---	1.02	---

2g/3c	1.25	64.3	1.14	56.5	1.01	37.0	0.99	25.7	0.99	---	0.99	---
3g/4c	1.43	64.2	1.17	56.6	1.03	36.7	1.01	25.2	0.99	---	1.00	---
7g/7c	1.38	53.6	1.17	50.2	1.01	32.3	1.01	21.7	1.00	---	1.00	---

Closed microchannel
# gen/# coll.	0.001 V/s		0.010 V/s		0.050 V/s		0.100 V/s		0.500 V/s		1.000 V/s

	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%	A_f	C_e/%
1g/1c	3.50	76.9	1.18	60.8	1.00	22.0	1.00	12.9	1.01	---	1.02	---
1g/2c	4.51	91.4	1.45	81.1	1.01	56.7	1.04	38.2	1.02	---	1.04	---
1g/4c	3.33	96.2	0.97	87.6	0.73	59.4	0.77	45.2	0.80	---	1.02	---
1g/6c	4.20	113.2	1.50	94.7	0.97	74.5	0.89	41.9	0.91	---	0.89	---

2g/3c	2.76	95.5	1.48	86.4	1.12	73.2	0.67	67.0	0.92	67.0	0.94	---
3g/4c	7.60	109.3	1.68	91.1	1.00	65.7	0.99	45.7	0.99	---	0.99	---
7g/7c	4.83	84.8	1.66	75.8	0.93	55.4	0.98	38.7	1.01	---	0.99	---