IDA (Interdigitated Array) Electrode 3µm
More fine IDA(Pt/Au) Electrode has been developed. Its 3µm pitch working electrodes significantly increase redox cycle and allow reserachers to perform ultra-sensitive measurement.
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We recommend to apply Ag/AgCl ink to a reference electrode in order to stabilize potential of the electrode.
Micro Volume Sample Measurement with IDA Electrode 3µm and Cable kit
- Insert IDA Electrode 3µm onto Cable kit
This electrode can be used with Cable kit for IDA electrode (Catalog No.011122).
- Put sample solution by drops on the IDA electrode. Make the
solution to cover the comb-shaped working electrode, the
reference electrode and the counter electrode.
Researchers can do comfortable measurement by using Dual electrochemical analyzer such as ALS800B series and 700C series.
Technical data concerning IDA Electrode 3µm
Fig.1 -- Accuracy
A CV curve obtained by 3µm IDA Electrode Au[A] mirrored that of
3µm IDA Electrode Au[B], which means both of the IDA Electrodes were
produced very accurately.
- Left: IDA Electrode 3µm Au[A], Right: IDA Electrode 3µm Au[B]
- Sample: ferrocene methanol 1 mM/ 0.5 M NaCl solution
- Mode: Single
- Sweep Rate: 30 mV/s
Fig.2 -- CV by Dual mode
- Mode: Dual
- Sweep Rate at G-Electrodes: 10 mV/s
- Applied Voltage to C-Electrodes: -0.2 V
Fig.3 & 4 -- Comparison of IDA 3µm with 5µm by Dual Mode
For 3μm Electrode, the limiting current of ferrocene methanol by CV dual mode was 8 times as much as of the peak current by single mode, while this ratio for 5μm Electrode was about 4. This means large increase of the redox cycle.
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Fig3. IDA Electrode 3µm Au 
Sweep Rate: 10 mV/s |
Fig.4 IDA Electrode 5µm Au 
Sweep Rate: 10 mV/s |
| *Larger area in 5µm IDA Electrode gives the appearance as if its absolute current is larger than 3µm of IDA | |
Fig.5 -- Capture Efficiency
Fig.5 shows a result of LSV Dual mode measurement. Its collection efficiency was proved to be 96.4% by our calculation from limiting current of Collector electrodes and Generator electrodes.
- Method: LSV (Liner Sweep Voltammetry)
- Mode: Dual
- Sample: ferrocene methanol 1 mM/0.5 M Nacl solution
- Sweep Rate: 10 mV/s
Besides CV, LSV electrochemical technique, our
IDA Electrode is available for various electrochemical measuring
technique such as chronoamperometry, normal pulse, differential
pulse voltammetry etc.
Researchers can obtain more insights by using IDA Electrodes.
| Catalog No. | Description | Width(µm) | Interval(µm) | Length(mm) | Number of feet (pairs) |
| 011960 | IDA electrode (Au) 3um | 3 | 3 | 2 | 65 |
| 011961 | IDA electrode (Pt) 3um | 3 | 3 | 2 | 65 |
| 011122 | Cable kit for IDA electrode |