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XP PI/PET Flexible Interdigitated Electrode (Custom Specifications)

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  • Description:XP PI/PET Flexible Interdigitated Electrode (Custom Specifications)
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Flexible Interdigitated Electrode (IDE) | High-Precision Flexible Microelectrode
HIGH-PRECISION FLEXIBLE MICROELECTRODE

Flexible Interdigitated Electrode Interdigitated Electrode

Designed with micron-scale metal traces and flexible substrates, combining high sensitivity, uniform electric-field distribution, a thin bendable form factor, and easy integration for electrochemical detection, biosensing, gas sensing, impedance analysis, flexible electronics, microfluidic chips, and other research and industrial applications.

Micron-Scale Line Width & Spacing PI / PET Substrates Au / Ni / Cu Metal Layers Single-Channel / Multi-Channel Custom Pattern Design
μm Micron-Scale Precision Customizable Line Width and Spacing
Flexible and Bendable Fits Flat and Curved Structures
Au Stable Metal Surface Layer Good Conductivity and Oxidation Resistance
PI / PET Two Flexible Substrate Options
Micron Scale Line Width and Spacing Fabrication Capability
Au/Ni/Cu Multilayer Metal Composite Structure
OEM Custom Size, Pattern, and Channel Layout
IDE Principle

What Is an Interdigitated Electrode?

An interdigitated electrode consists of two insulated comb-like electrode sets arranged in an interlocking pattern. The interdigitated structure increases the effective electrode boundary and active area within a limited footprint, making it suitable for detecting changes in conductivity, capacitance, impedance, and interfacial reactions.

INTERDIGITATED STRUCTURE

Creates a Uniform, Concentrated Sensing Area Through Interdigitated Microelectrodes

When a sample, film, liquid, or functional material covers the interdigitated area, the electrical response between the two electrode sets changes with dielectric constant, conductivity, surface adsorption, biological reactions, or material-state changes, enabling highly sensitive detection.

Suitable for AC impedance, capacitance, conductance, electrochemical response, and material-interface behavior studies.

Small Electrode Spacing

The compact interdigitated microstructure shortens the electric-field interaction distance, helping detect subtle electrical changes.

High Sensitivity

Greater effective boundary length and sensing area can improve sensor response capability.

Uniform Electric-Field Distribution

The regular interdigitated structure helps create a repeatable, easy-to-analyze local electric field.

Easy Integration

Can be combined with flexible films, microfluidic channels, functional coatings, and test circuits.

Layer Structure

Multilayer Metal Composite Structure

Flexible interdigitated electrodes can use gold, nickel, copper, and flexible polymer substrates to form a composite structure that balances conductivity, adhesion strength, oxidation resistance, and flexibility.

Au Surface Functional Layer Ni Transition Layer Cu Conductive Layer PI / PET Flexible Substrate
Au

Gold Surface Layer

Provides good conductivity, oxidation resistance, and surface stability, facilitating electrochemical modification, biomolecule immobilization, and long-term testing.

Ni

Nickel Intermediate Layer

As a metal transition layer, it improves bonding between the surface metal and copper traces, enhancing structural stability and fabrication reliability.

Cu

Copper Conductive Layer

Provides the main current-transfer path with good conduction efficiency, suitable for forming fine traces, interdigitated patterns, and external contact pads.

PI

Flexible Substrate

PI or PET can be selected according to temperature resistance, transparency, bending performance, and experimental environment, enabling thin, flexible, and conformal applications on curved surfaces.

Material Comparison

PI and PET Substrate Parameter Comparison

PI is better for experiments requiring temperature resistance, chemical resistance, and long-term stability; PET is better for transparent observation, optical detection, and room-temperature flexible applications.

Comparison Parameter
Polyimide

PI Polyimide

Temperature-resistant, chemically resistant, suitable for long-term experiments

Polyethylene Terephthalate

PET Polyester Film

Transparent, thin, lightweight, and convenient for optical observation

Typical Temperature Reference Approx. -269°C to 280°C Approx. -60°C to 200°C
TransparencyUsually amber-colored or opaque, with limited optical observation capabilityHigher transparency, convenient for microscopy and optical-path observation
Chemical ResistanceGenerally good, suitable for various acid/base and chemical experimental environmentsSuitable for routine testing environments; strongly corrosive systems should be verified in advance
Mechanical StabilityGood fatigue resistance and dimensional stability, suitable for repeated bendingThin, lightweight, and flexible, suitable for general bending and disposable devices
Long-Term Operation CapabilitySuitable for long-duration testing and high-reliability experimentsMore suitable for room-temperature, short-cycle, or visualized testing
Typical ApplicationsElectrochemical detection, high-temperature experiments, flexible electronics, long-term cycling, and complex chemical environmentsOptoelectronic experiments, transparent sensing, visualized microfluidics, microscopic observation, and room-temperature detection
Recommended ChoiceFocus on temperature resistance, durability, and stabilityFocus on transparency, thinness, light weight, and visualization
Note: The temperature ranges in the table are material-level reference ranges. Actual usable temperature may be affected by substrate model, metal-layer structure, adhesive system, packaging method, bending state, and experimental media. Specific operating conditions should be based on actual product specifications and test results.
Specifications

Product Specifications and Custom Parameters

Interdigitated finger length, line width, spacing, number of pairs, and channel structure can be customized according to chip size, detection sensitivity, sample type, test interface, and installation environment.

Parameter ItemStandard OptionCustomization CapabilitySelection Notes
Overall Size5×10、10×10、10×20 mmCustom length, width, and irregular outlines supportedDetermined by installation space and effective testing area
Finger LengthConfigured according to standard patternsSpecified effective finger length supportedLonger fingers can enlarge the sensing area
Line WidthMicron-scale precision tracesCustomizable according to fabrication capabilityAffects resistance, area, and structural reliability
SpacingMicron-scale spacingDifferent spacing combinations supportedSmaller spacing concentrates the local electric-field effect
Number of Interdigitated PairsMultiple specification options availableSpecified pair count and total finger count supportedAffects effective boundary length and detection response
Substrate TypePI / PETSelectable according to application environmentPI favors stability; PET favors transparency
Electrode StructureAu / Ni / Cu Composite StructureMetal-layer configuration can be adjustedShould be selected according to potential window and experimental media
Channel FormatSingle ChannelDual-channel, multi-channel, and array designsSuitable for multi-point detection or control experiments
Connection MethodPads, clips, and pogo-pin connectionsLead wires, flex cables, and interface customization supportedDetermined by test instruments and assembly method
Pattern DesignStandard rectangular interdigitated patternArc, ring, and special patterns supportedCan fit curved surfaces, flow channels, or local detection areas
Core Features

Core Product Features

From microstructure fabrication and flexible adaptation to electrochemical applications, it provides a stable electrode platform for sensor development, material testing, and micro/nano device research.

μm

Micron-Scale Precision Structure

Manufactured by precision patterning and metal deposition processes, it can form regular and uniform interdigitated traces suitable for high-sensitivity detection and miniaturized device integration.

Uniform Line Width Controlled Spacing Pattern Consistency

Flexible and Bendable

The flexible substrate can adapt to flat, curved, and mildly dynamic bending environments, suitable for flexible electronics, wearable devices, and irregular-structure installation.

Thin and Lightweight Structure Conformal to Curved Surfaces Flexible Integration

Good Electrical and Electrochemical Performance

The metal composite structure balances conductivity, surface stability, and connection reliability, and can be used for impedance, capacitance, conductance, and electrochemical response testing.

Impedance Testing Conductance Analysis Surface Modification

Highly Customizable

Size, substrate, line width/spacing, number of fingers, connection pads, and multi-channel layout can be adjusted for specific research plans.

Custom Size Multi-Channel Design Special Patterns
Applications

Typical Application Areas

It can be used as an independent sensing electrode or integrated with functional materials, microchannels, biorecognition layers, flexible substrates, and test circuits.

01 🧪

Electrochemical Sensing

Used for current, voltage, impedance, capacitance, and interfacial electrochemical response testing.

02 🧬

Biosensing

Can be used for DNA, proteins, cells, biomarkers, and molecular recognition studies.

03 🌫

Gas and Humidity Sensing

Combined with gas-sensitive, humidity-sensitive, or porous functional materials, to detect VOCs and environmental changes.

04 📡

Flexible Electronics

Suitable for wearable devices, electronic skin, and curved flexible sensing systems.

05 🔬

Microfluidic Chips

Can be integrated with Lab-on-a-chip channels for in-situ and small-volume detection.

06

Conductive Material Testing

Analyze the electrical properties of films, slurries, polymers, nanomaterials, and composite materials.

07 💡

Optoelectronic Experiments

PET Transparent substrates are suitable for optical irradiation, microscopic observation, and transparent device studies.

08

Array-Based Detection

Multi-channel electrodes can be used for control experiments, gradient testing, and multi-point synchronous acquisition.

Selection Guide

How to Choose the Right Flexible Substrate?

An initial selection can be made based on experimental temperature, medium environment, transparency requirements, service duration, and bending method.

Recommended PI Substrate

Prioritizes Temperature Resistance and Long-Term Stability

Suitable for higher temperatures, complex chemical media, cycling experiments, and applications with higher reliability requirements.

  • High-Temperature Experiments
  • Long-Term Cycling Operation
  • Electrochemical Detection
  • Acid/Base Media Studies
  • Flexible Electronics
  • High-Reliability Testing
Recommended PET Substrate

Prioritizes Transparency and Optical Observation

Suitable for room-temperature, visualized, microscopic-observation, and flexible-device applications requiring a transparent optical path.

  • Optical Experiments
  • Microscopic Observation
  • Transparent Sensors
  • Visualized Microfluidics
  • Thin and Lightweight Devices
  • Room-Temperature Flexible Testing
Customization Process

Flexible Interdigitated Electrode Customization Process

By clarifying application conditions and key pattern parameters, a manufacturable, testable, and assemblable electrode design can be quickly developed.

01

Confirm Application Requirements

Provide the test object, working medium, temperature, and detection method.

02

Define Key Parameters

Confirm size, substrate, line width, spacing, and number of interdigitated pairs.

03

Confirm Pattern Design

Confirm pads, interfaces, channel layout, and effective detection area.

04

Sample Fabrication and Verification

Complete sample fabrication and optimize subsequent plans based on test results.

Design a Dedicated Flexible IDE for Your Experiment

Submit overall size, substrate type, line width, spacing, finger length, number of interdigitated pairs, metal structure, channel count, and connection method, and we can evaluate a custom solution.

Comprehensive Price Table

Dimensions (Finger Length)Finger PairsLine Width/Spacing (um/um)SubstrateAliExpressAmazon SKUPrice ($)
5*5mm15 Pairs50/50Yellow PIIDE-PI1IDE-0505-15P-50WS-PI$41
5*5mm7 Pairs50/100Yellow PIIDE-PI2IDE-0505-7P-50W100S-PI$41
10*10mm15 Pairs100/50Yellow PIIDE-PI3IDE-1010-15P-100W50S-PI$16
10*10mm5 Pairs100/100Yellow PIIDE-PI4IDE-1010-5P-100WS-PI$30
10*20mm25 Pairs50/50Yellow PIIDE-PI5IDE-1020-25P-50WS-PI$32
10*20mm25 Pairs100/50Yellow PIIDE-PI6IDE-1020-25P-100W50S-PI$32
10*20mm20 Pairs100/100Yellow PIIDE-PI7IDE-1020-20P-100WS-PI$32
10*20mm12 Pairs200/200Yellow PIIDE-PI8IDE-1020-12P-200WS-PI$32
20*15mm25 Pairs50/50Yellow PIIDE-PI9IDE-2015-25P-50WS-PI$40
25*63mm25 Pairs150/850Yellow PIIDE-PI10IDE-2563-25P-150W850S-PI$86
60*60mm80 Pairs100/100Yellow PIIDE-PI11IDE-6060-80P-100WS-PI$86
70*65mm80 Pairs100/100Yellow PIIDE-PI12IDE-7065-80P-100WS-PI$94
10*10mm15 Pairs100/50Transparent PETIDE-PET1IDE-1010-15P-100W50S-PET$16
10*10mm5 Pairs100/100Transparent PETIDE-PET2IDE-1010-5P-100WS-PET$30
10*20mm25 Pairs50/50Transparent PETIDE-PET3IDE-1020-25P-50WS-PET$32
10*20mm25 Pairs100/50Transparent PETIDE-PET4IDE-1020-25P-100W50S-PET$32
10*20mm20 Pairs100/100Transparent PETIDE-PET5IDE-1020-20P-100WS-PET$32
10*20mm12 Pairs200/200Transparent PETIDE-PET6IDE-1020-12P-200WS-PET$32
11*25mm4 Pairs800/500Transparent PETIDE-PET7IDE-1125-4P-800W500S-PET$74
11*25mm25 Pairs800/50Transparent PETIDE-PET8IDE-1125-25P-800S50W-PET$69
20*15mm25 Pairs50/50Transparent PETIDE-PET9IDE-2015-25P-50WS-PET$40
21*31mm28 Pairs150/200Transparent PETIDE-PET10IDE-2131-28P-150W200S-PET$74
25*30mm10 Pairs200/200Transparent PETIDE-PET11IDE-2530-10P-200WS-PET$74
36*39mm12 Pairs100/900Transparent PETIDE-PET12IDE-3639-12P-100W90S-PET$102

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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.


6. Vacuum Modulable Cu(0)/Cu(I)/Cu(II) sites of Cu/C catalysts derived from MOF for highly selective CO2 electroreduction to hydrocarbons

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.


2. Joule A high-voltage and stable zinc-air battery enabled by dual-hydrophobic-induced proton shuttle shielding

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.


6. SSRN An Axially Directed Cobalt-Phthalocyanine Covalent Organic Polymer as High-Efficient Bifunctional Catalyst for Zn-Air Battery

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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