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Gold Foil

Available Configurations

Properties common to all products in this list

Commodity: Precious Metals Material: Gold Form: Foil/Film/Sheet Composition: Au CAS Number: 7440-57-5 Coating: Uncoated
Purity Thickness Length Width Temper Options Surface Finish Options
99.9% to 99.999% 0.001mm to 2mm 5mm to 150mm 5mm to 150mm As Rolled Polished on both sides

Need custom configurations? Please contact our Technical Solutions team.

Designed for high-performance environments, Goodfellow's Gold Foil delivers exceptional purity and reliability - ideal for electronics, aerospace, biomedical implants, and scientific applications. Produced from 99.9% to 99.999% pure gold with ultra-tight thickness ranges (0.001 mm to 2 mm), it integrates seamlessly into assemblies where precision, quality, and repeatability matter. We offer in lengths and widths from 5 mm to 150 mm with optional polishing on both sides. Gold’s chemical inertness ensures corrosion resistance in aggressive environments, while its high melting point and boiling point support reliable performance under extreme heat. Its high density also delivers strength and stability even for ultrathin foils. Owing to its low electrical resistivity, it excels in high-frequency RF/microwave circuits, and its optical reflectivity supports use in infrared sensors and thermal control coatings. Combined with catalytic activity, biocompatibility and chemical stability, these properties make our gold foil the top choice for electrodes, connectors, thermal control coatings, and implantable medical devices.
Do you need this material in another form?
Coil Disk Foil (Light Tight)
Starting at $347.00 each
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Key Features

Gold foil possesses a combination of material characteristics that make it particularly well suited for electronics, aerospace, biomedical, and scientific applications:


Exceptional Chemical Inertness

Gold is highly resistant to oxidation and corrosion, maintaining chemical stability in a wide range of environments, including strong acids, alkalis, and oxidising gases. Its stability under aggressive conditions ensures long-term reliability in corrosive or reactive systems.


High Melting Point (1,064 °C)

With a high melting point of 1,064°C, gold remains structurally stable in extreme thermal conditions. This property is especially suitable for high-temperature tooling, thermal shielding, soldering and brazing fixtures.


High Density (19.32 g/cm³)

Gold's high density contributes to excellent dimensional stability. Even for ultra-thin foils, it maintains precision and vibration resistance, which are critical for advanced applications such as microelectromechanical systems (MEMS) — especially resonators and inertial sensors.


High Electrical Conductivity (22.14 nΩ·m)

Gold's exceptional conductivity ensures minimal ohmic loss, making it a preferred material for corrosion-resistant electrical contacts, connectors, and microelectronic components. Its low resistivity supports high-frequency performance in RF/microwave systems — including transmission lines and resonators — while also enabling precision EMI/RFI shielding coatings.


Optical Reflectivity & Infrared Performance

Gold foil's high reflectivity — particularly in the infrared spectrum — makes it indispensable for spacecraft thermal control films, satellite reflectors, and precision optical coatings. Its optical stability and resistance to oxidation also support applications in laser optics and IR sensors.


Exceptional Ductility & Malleability

One of the most ductile and malleable metals, gold can be rolled into ultra-thin foils without cracking. These properties enable the precision forming, fine-feature patterning, and high-surface-area coverage required for high-reliability micro-connectors, flexible interconnects, and other advanced applications.


Biocompatibility

Naturally bioinert and non-toxic, gold is used in medical devices, neural implants, biosensors, and even foods. It does not trigger adverse immune responses, making it suitable for prolonged contact with biological tissues and fluids.

Industrial Applications

High-purity gold foil is used across high-technology sectors for its high electrical conductivity, chemical inertness, malleability, and thermal stability:

✦ Aerospace & Space Systems
Employed in spacecraft thermal insulation and infrared reflectors, where its high reflectivity and resistance to degradation ensure long-term performance in vacuum and radiation environments.
✦ Electronics & RF Engineering
Used in high-frequency microwave circuits, resonators, precision connectors, and high-reliability EMI/RFI shielding — owing to its low resistivity and unmatched corrosion resistance.
✦ Flexible & Microelectronic Interconnects
Forms ultra-thin, crack-resistant conductive pathways in flexible printed circuits and precision micro-connectors due to its ductility and resistance to corrosion.
✦ Scientific Instrumentation
Employed in vacuum systems, optical mirrors, and X-ray reflectors for its inertness, high reflectivity, and dimensional stability under varying pressures and temperatures.
✦ Medical & Bioelectronic Devices
Used in implantable electrodes, biosensors, and micro-scale medical devices where biocompatibility, electrical performance, and long-term corrosion resistance are essential.

Mentions in Scientific Literature

Goodfellow's gold foil features prominently in research including but not exclusive to domains such as: Photoelectron Spectroscopy & Calibration, where it serves as a clean, stable reference material in high-energy X-ray and electron spectroscopy experiments, and in devices that calibrate electron energy [1–4] . Ion-Beam Analysis & Energy Loss Measurements, used as stopping foils in experiments to determine the energy loss of ions when passing through certain materials [5] . Materials Science & Surface Coatings, providing uniform, conductive substrates for film deposition on ultra micro-electrodes [6–8] . High-Pressure Physics & Materials Science, used in extreme pressure and laser heating experiments, during which foils have been observed to melt, pore, or disperse particles in water [9] . Single-Particle Electrochemistry, used to form microelectrodes for ultrasensitive, real-time detection of individual photoelectrochemical reactions [10] .

Across these disciplines researchers have utilised our gold foils as wide-scan calibration standards in high-energy X-ray and electron spectroscopy [1–4] , precise ion-stopping layers for energy loss measurements [5] , electron-transport electrode substrates for thin-film deposition [6–8] , and ultra micro-electrode substrates for single-particle electrochemical detection [9–10] — applications that all benefit from gold's exceptional purity, conductivity, and chemical stability.

References & Citations

Click to expand
  1. Tereshatov, E. E., Miroslava Semelová, Kateřina Čubová, Bartl, P., Mojmír Němec, Štursa, J., Zach, V., Folden, C. M., Omtvedt, J. P., & John, J. (2021). Valence states of cyclotron-produced thallium. New Journal of Chemistry, 45(7), 3377–3381. https://doi.org/10.1039/d0nj05198e
  2. Vanleenhove, A., Hoflijk, I., Vaesen, I., Zborowski, C., Artyushkova, K., & Conard, T. (2022). High-energy x-ray photoelectron spectroscopy spectra of SiO2 measured by Cr Kα. Surface Science Spectra, 29(1). https://doi.org/10.1116/6.0001526
  3. Vanleenhove, A., Hoflijk, I., Zborowski, C., Vaesen, I., Artyushkova, K., & Conard, T. (2022). High-energy x-ray photoelectron spectroscopy spectra of TiO2 measured by Cr Kα. Surface Science Spectra, 29(1). https://doi.org/10.1116/6.0001529
  4. Hoflijk, I., Vanleenhove, A., Vaesen, I., Zborowski, C., Artyushkova, K., & Conard, T. (2022). High energy x-ray photoelectron spectroscopy spectra of Si3N4 measured by Cr Kα. Surface Science Spectra, 29(1). https://doi.org/10.1116/6.0001524
  5. Strub, E., Bohne, W., & Röhrich, J. (2006). Determination of the energy loss of various elements in metal foils with the TOF-ERDA setup at the ISL Berlin. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 249(1–2), 62–64. https://doi.org/10.1016/j.nimb.2006.03.079
  6. Tondu, T., Belhaj, M., & Inguimbert, V. (2010). Methods for measurement of electron emission yield under low energy electron-irradiation by collector method and Kelvin probe method. Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 28(5), 1122–1125. https://doi.org/10.1116/1.3462039
  7. Zborowski, C., Vaesen, I., Vanleenhove, A., Hoflijk, I., Artyushkova, K., & Conard, T. (2022). High-energy x-ray photoelectron spectroscopy spectra of InP measured by Cr Kα. Surface Science Spectra, 29(1). https://doi.org/10.1116/6.0001521
  8. Hoflijk, I., Vanleenhove, A., Zborowski, C., Vaesen, I., Artyushkova, K., & Conard, T. (2022). High-energy x-ray photoelectron spectroscopy spectra of TiN measured by Cr Kα. Surface Science Spectra, 29(1). https://doi.org/10.1116/6.0001528
  9. Husband, R. J., McWilliams, R. S., Pace, E. J., Coleman, A. L., Hwang, H., Choi, J., Kim, T., Hwang, G. C., Ball, O. B., Chun, S. H., Nam, D., Kim, S., Hyunchae Cynn, Prakapenka, V. B., Shim, S.-H., Sven Toleikis, McMahon, M. I., Lee, Y., & Liermann, H.-P. (2021). X-ray free electron laser heating of water and gold at high static pressure. Communications Materials, 2(1). https://doi.org/10.1038/s43246-021-00158-7
  10. Ma, W., Ma, H., Peng, Y.-Y., Tian, H., & Long, Y.-T. (2019). An ultrasensitive photoelectrochemical platform for quantifying photoinduced electron-transfer properties of a single entity. Nature Protocols, 14(9), 2672–2690. https://doi.org/10.1038/s41596-019-0197-8

Synonyms

Gold Sheet Au Foil Gold Leaf Gold Strip High-Purity Gold Foil Gold Electrode Foil Bare Gold Foil
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Available Configurations

Properties common to all products in this list

Commodity: Precious Metals Material: Gold Form: Foil Composition: Au CAS Number: 7440-57-5 Coating: Uncoated

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Tolerances

Foil
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%