High-Precision Microelectrode Structure · Flexible Substrate · Custom Solutions for Research and Industry
In flexible electronics, electrochemical sensing, biosensing, and micro/nano-device research, Interdigitated Electrodes (IDE) are widely used due to their high sensitivity, uniform electric field distribution, and ease of integration.
Flexible interdigitated electrodes utilize micron-scale metal trace structures fabricated on flexible substrates, providing lightweight, bendable, and versatile solutions for sensing, impedance analysis, conductivity testing, and microfluidic applications.
An Interdigitated Electrode (IDE) is a microstructured device consisting of two interlocking comb-shaped electrode arrays that are electrically isolated from each other.
Its key features include:
Small electrode spacing
High sensitivity
Uniform electric field distribution
Easy miniaturization
Flexible design capability
As a result, IDEs are widely used in:
Electrochemical sensing
Biosensing
Gas sensing
Impedance analysis
Flexible electronics
Microfluidic chips
Conductive material research
Flexible interdigitated electrodes typically employ a multilayer metal composite structure:
| Layer | Material |
|---|---|
| Surface Layer | Gold (Au) |
| Intermediate Layer | Nickel (Ni) |
| Conductive Layer | Copper (Cu) |
| Substrate | PI or PET |
Among them:
The gold layer provides excellent conductivity and oxidation resistance.
The nickel layer enhances adhesion and structural stability.
The copper layer serves as the primary conductive pathway.
The flexible substrate enables bending and lightweight applications.
PI substrates offer excellent heat resistance and chemical stability:
Temperature range: approximately -269°C to 280°C
Resistant to strong acids and alkalis
Excellent flexural and fatigue resistance
Stable mechanical properties
Suitable for long-term cyclic testing
Recommended for:
Electrochemical testing
High-temperature experiments
Flexible electronics
Long-term stable operation
PET substrates provide high transparency and lightweight characteristics:
Temperature range: approximately -60°C to 200°C
High optical transparency
Lightweight and flexible
Suitable for optical observation
Recommended for:
Optoelectronic experiments
Visible microfluidic systems
Transparent flexible devices
Room-temperature sensing applications
Flexible interdigitated electrodes support a wide range of customizable specifications:
| Parameter | Description |
|---|---|
| Overall Size | Common sizes: 5×10 mm, 10×10 mm, 10×20 mm |
| Finger Length | Customizable |
| Line Width | Micron-level customization available |
| Line Spacing | Micron-level customization available |
| Finger Pairs | Multiple options available |
| Substrate Type | PI / PET |
| Electrode Material | Au / Ni / Cu |
Supported configurations:
Single-channel structures
Multi-channel designs
High-density microelectrodes
Flexible curved structures
Custom pattern designs
Manufactured using precision etching and metal deposition processes, ensuring uniform line widths and spacings for highly sensitive detection applications.
Flexible substrates adapt to curved surfaces and dynamic bending requirements, making them ideal for flexible electronics and wearable technologies.
The stable metal surface layer enables applications such as:
Impedance testing
Electrochemical analysis
Biosensing
Conductivity characterization
Supports:
Various sizes
Different line widths and spacings
Different finger pair counts
Multi-channel configurations
Custom pattern designs
Meeting both research and industrial development requirements.
| Application Area | Description |
|---|---|
| 🧪 Electrochemical Sensing | Current, voltage, and impedance measurements |
| 🧬 Biosensing | Detection of DNA, proteins, and biomolecules |
| 🌫 Gas Sensing | VOC, humidity, and gas sensor testing |
| 📡 Flexible Electronics | Wearable and flexible electronic devices |
| 🔬 Microfluidic Chips | Lab-on-a-chip integration |
| ⚡ Conductive Material Testing | Thin films, inks, and nanomaterial analysis |
| 💡 Optoelectronic Experiments | Transparent devices and optical testing |
Recommended:
PI-Based Flexible Interdigitated Electrode
Suitable for:
High-temperature environments
Long-duration experiments
Strong acid and alkaline systems
High-reliability testing
Recommended:
PET-Based Flexible Interdigitated Electrode
Suitable for:
Optical experiments
Microscopic observation
Transparent devices
Room-temperature flexible applications
Flexible interdigitated electrodes combine:
High-precision microstructures
Flexible and bendable design
Excellent electrical conductivity
Extensive customization capabilities
Dual substrate options (PI / PET)
They are widely applicable in university research, laboratory development, electrochemical studies, flexible electronics, and sensor technologies.
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| Specification | PI Substrate (USD) | PET Substrate (USD) |
|---|---|---|
| 5×10mm-10Pairs-50μm Line Width/Spacing | 29 | 29 |
| 5×10mm-10Pairs-60μm Line Width/Spacing | 29 | 29 |
| 5×10mm-10Pairs-70μm Line Width/Spacing | 29 | 29 |
| 5×10mm-10Pairs-80μm Line Width/Spacing | 29 | 29 |
| 5×10mm-10Pairs-90μm Line Width/Spacing | 29 | 29 |
| 5×10mm-10Pairs-100μm Line Width/Spacing | 12 | 12 |
| 5×10mm-15Pairs-50μm Line Width/Spacing | 25 | 25 |
| 5×10mm-15Pairs-60μm Line Width/Spacing | 21 | 21 |
| 5×10mm-15Pairs-70μm Line Width/Spacing | 17 | 17 |
| 5×10mm-15Pairs-80μm Line Width/Spacing | 17 | 17 |
| 5×10mm-15Pairs-90μm Line Width/Spacing | 17 | 17 |
| 5×10mm-15Pairs-100μm Line Width/Spacing | 12 | 12 |
| 10×10mm-10Pairs-50μm Line Width/Spacing | 29 | 29 |
| 10×10mm-10Pairs-100μm Line Width/Spacing | 29 | 29 |
| 10×10mm-15Pairs-50μm Line Width/Spacing | 28 | 28 |
| 10×10mm-15Pairs-60μm Line Width/Spacing | 26 | 26 |
| 10×10mm-15Pairs-70μm Line Width/Spacing | 20 | 20 |
| 10×10mm-15Pairs-80μm Line Width/Spacing | 20 | 20 |
| 10×10mm-15Pairs-90μm Line Width/Spacing | 20 | 20 |
| 10×10mm-15Pairs-100μm Line Width/Spacing | 20 | 20 |
Partial references citing our materials (from Google Scholar)
Carbon Dioxide Reduction
1. ACS Nano Strain Relaxation in Metal Alloy Catalysts Steers the Product Selectivity of Electrocatalytic CO2 Reduction
The bipolar membrane (Fumasep FBM) in this paper was purchased from SCI Materials Hub, which was used in rechargeable Zn-CO2 battery tests. The authors reported a strain relaxation strategy to determine lattice strains in bimetal MNi alloys (M = Pd, Ag, and Au) and realized an outstanding CO2-to-CO Faradaic efficiency of 96.6% with outstanding activity and durability toward a Zn-CO2 battery.
2. Front. Chem. Boosting Electrochemical Carbon Dioxide Reduction on Atomically Dispersed Nickel Catalyst
In this paper, Vulcan XC-72R was purchased from SCI Materials Hub. Vulcan XC 72R carbon is the most common catalyst support used in the anode and cathode electrodes of Polymer Electrolyte Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), Alkaline Fuel Cells (AFC), Microbial Fuel Cells (MFC), Phosphoric Acid Fuel Cells (PAFC), and many more!
3. Adv. Mater. Partially Nitrided Ni Nanoclusters Achieve Energy-Efficient Electrocatalytic CO2 Reduction to CO at Ultralow Overpotential
An AEM membrane (Sustainion X37-50 Grade RT, purchased from SCI Materials Hub) was activated in 1 M KOH for 24 h, washed with ultra-purity water prior to use.
4. Adv. Funct. Mater. Nanoconfined Molecular Catalysts in Integrated Gas Diffusion Electrodes for High-Current-Density CO2 Electroreduction
In this paper (Supporting Information), an anion exchanged membrane (Fumasep FAB-PK-130 obtained from SCI Materials Hub (www.scimaterials.cn)) was used to separate the catholyte and anolyte chambers.
SCI Materials Hub: we also recommend our Fumasep FAB-PK-75 for the use in a flow cell.
5. Appl. Catal. B Efficient utilization of nickel single atoms for CO2 electroreduction by constructing 3D interconnected nitrogen-doped carbon tube network
In this paper, the Nafion 117 membrane was obtained from SCI Materials Hub.
In this paper, Proton exchange membrane (Nafion 117), Nafion D520, and Toray 060 carbon paper were purchased from SCI Materials Hub.
7. National Science Review Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways
An anion exchange membrane (PiperION-A15-HCO3) was obtained from SCI Materials Hub.
8. Catalysis Communications Facilitating CO2 electroreduction to C2H4 through facile regulating {100} & {111} grain boundary of Cu2O
Carbon paper (TGPH060), membrane solution (Nafion D520), and ionic membrane (Nafion N117) were obtained from Wuhu Eryi Material Technology Co., Ltd (a company under SCI Materials Hub).
Batteries
1. J. Mater. Chem. A Blocking polysulfides with a Janus Fe3C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries
Graphene oxide (GO) in this paper was obtained from SCI Materials Hub. The authors introduced a Janus Fe3C/N-CNF@RGO electrode consisting of 1D Fe3C decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and 2D reduced graphene oxide (RGO) side as the free-standing carrier of Li2S6 catholyte to improve the overall electrochemical performance of Li-S batteries.
This paper used more than 10 kinds of materials from SCI Materials Hub and the authors gave detailed properity comparsion.
The commercial IEMs of Fumasep FAB-PK-130 and Nafion N117 were obtained from SCI Materials Hub.
Gas diffusion layers of GDL340 (CeTech) and SGL39BC (Sigracet) and Nafion dispersion (Nafion D520) were obtained from SCI Materials Hub.
Zn foil (100 mm thickness) and Zn powder were obtained from the SCI Materials Hub.
Commercial 20% Pt/C, 40% Pt/C and IrO2 catalysts were also obtained from SCI Materials Hub.
3. Journal of Energy Chemistry Vanadium oxide nanospheres encapsulated in N-doped carbon nanofibers with morphology and defect dual-engineering toward advanced aqueous zinc-ion batteries
In this paper, carbon cloth (W0S1011) was obtained from SCI Materials Hub. The flexible carbon cloth matrix guaranteed the stabilization of the electrode and improved the conductivity of the cathode.
4. Energy Storage Materials Defect-abundant commercializable 3D carbon papers for fabricating composite Li anode with high loading and long life
The 3D carbon paper (TGPH060 raw paper) were purchased from SCI Materials Hub.
5. Nanomaterials A Stable Rechargeable Aqueous Zn–Air Battery Enabled by Heterogeneous MoS2 Cathode Catalysts
Nafion D520 (5 wt%), and carbon paper (GDL340) were received from SCI-Materials-Hub.
Carbon cloth (W0S1011) and other electrochemical consumables required for air cathode were provided by SCI Materials Hub.
Oxygen Reduction Reaction
1. J. Chem. Eng. Superior Efficiency Hydrogen Peroxide Production in Acidic Media through Epoxy Group Adjacent to Co-O/C Active Centers on Carbon Black
In this paper, Vulcan XC 72 carbon black, ion membrane (Nafion N115, 127 μL), Nafion solution (D520, 5 wt%), and carbon paper (AvCarb GDS 2230 and Spectracarb 2050A-1050) were purchased from SCI Materials Hub.
2. Journal of Colloid and Interface Science Gaining insight into the impact of electronic property and interface electrostatic field on ORR kinetics in alloy engineering via theoretical prognostication and experimental validation
The 20 wt% Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) were purchased from SCI Materials Hub. This work places emphasis on the kinetics of the ORR concerning Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) catalysts, and integrates theoretical prognostication and experimental validation to illuminate the fundamental principles of alloy engineering.
Water Electrolysis
1. International Journal of Hydrogen Energy Gold as an efficient hydrogen isotope separation catalyst in proton exchange membrane water electrolysis
The cathodic catalysts of Pt/C (20 wt%, 2–3 nm) and Au/C (20 wt%, 4–5 nm) were purchased from SCI Materials Hub.
2. Small Science Silver Compositing Boosts Water Electrolysis Activity and Durability of RuO2 in a Proton-Exchange-Membrane Water Electrolyzer
Two fiber felts (0.35 mm thickness, SCI Materials Hub) were used as the porous transport layers at both the cathode and the anode.
3. Advanced Functional Materials Hierarchical Crystalline/Amorphous Heterostructure MoNi/NiMoOx for Electrochemical Hydrogen Evolution with Industry-Level Activity and Stability
Anion-exchange membrane (FAA-3-PK-130) was obtained from SCI Materials Hub website.
Fuel Cells
1. Polymer Sub-two-micron ultrathin proton exchange membrane with reinforced mechanical strength
Gas diffusion electrode (60% Pt/C, Carbon paper) was purchased from SCI Materials Hub.
Characterization
1. Chemical Engineering Journal Electrochemical reconstitution of Prussian blue analogue for coupling furfural electro-oxidation with photo-assisted hydrogen evolution reaction
An Au nanoparticle film was deposited on the total reflecting plane of a single reflection ATR crystal (SCI Materials Hub, Wuhu, China) via sputter coater.
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