OpenDOAR - Directory of Open Access Repositories
OpenDOAR is an authoritative directory of academic open access repositories. Each OpenDOAR repository has been visited by project staff to check the information that is recorded here. This in-depth approach does not rely on automated analysis and gives a quality-controlled list of repositories.
As well as providing a simple repository list, OpenDOAR lets you search for repositories or search repository contents. Additionally, we provide tools and support to both repository administrators and service providers in sharing best practice and improving the quality of the repository infrastructure. Further explanation of these features is given in a project document Beyond the list.
Browse through Nanotechnology related papers archived: OpenDOAR Nanotechnology
Drexel' E-Repository and Archives - iDEA is also indexed in the OpenDOAR Directory of Open Access Repositories.