General Description of CNBMT '11 Scope: The 4th Carbon Nanomaterials in Biology, Medicine & Toxicology Symposium aims to serve this particular area of carbon nanomaterials research and development that holds tremendous interest and potential. The CNBMT'11 Satellite Symposium will focus on the interaction of nanotubes and graphene with cells and tissues in vitro and in vivo, and explore specific applications of carbon-based nanomaterials in the biomedical field. We will highlight the correlation between the specific characteristics of carbon nanomaterials (method of synthesis and manufacturing, purity, type of surface functionalization) and their biological effect in various model systems (immortalized or primary cells, in vivo models). Great emphasis will be placed in determining the therapeutic and diagnostic potential of carbon nanomaterials and the challenges ahead. Moreover, particular attention will be placed on attempts to understand the toxicological and environmental risks posed by use of carbon nanotubes. Objectives: To open a dialogue between scientists developing carbon nanotubes and graphene, regulatory authorities and the environmental and public health community in order to help determine the potential opportunities and risks associated with carbon nanomaterial applications. Moreover, to open a dialogue among the international carbon nanotube and graphene scientific community, the companies and investors interested in nanocarbon science and technology, and the biological and biomedical community that will be the end users of carbon nanomaterial technologies.   Structure of the Meeting: This two-day Symposium will take place on Friday 15 July and Saturday 16 July 2011. The programme will comprise invited lectures (45min), talks selected from submitted abstracts (15min) and poster presentations addressing the critical questions in the development of carbon nanotubes and graphene in biology, medicine and toxicology, as well as a magnificent dinner in one of the historic Cambridge colleges.