Platinum (also known as sponsored or diamond) open access journals allow immediate access to the content of the journal without the payment of a subscription fee or license. Authors pay no article publication charge and all the costs of publishing the journal are met by one or more sponsoring organizations.

IOP is the abbreviation of the Institute of Physics that publishes, journals, books etc. As mentioned on the IOP website that "Platinum (also known as sponsored or diamond) open access journals allow immediate access to the content of the journal without the payment of a subscription fee or licence. Authors pay no article publication charge and all the costs of publishing the journal are met by one or more sponsoring organizations."

Platinum (also known as sponsored or diamond) open access journals allow immediate access to the content of the journal without the payment of a subscription fee or licence. Authors pay no article publication charge and all the costs of publishing the journal are met by one or more sponsoring organizations.

IOP publishes two sponsored open access journals on behalf of partners:

• The Vietnamese Academy of Science & Technology: Advances in Natural Sciences: Nanoscience and Nanotechnology
• China Academy of Engineering Physics: International Journal of Extreme Manufacturing