1. Different synthesis process of Carbon nanomaterials for biological applications1.1 Introduction1.2 Preparation/Synthesis of carbon nanomaterials1.2.1 Synthesis of carbon nanoparticles1.2.2 Synthesis of Carbon nanotubes1.2.3 Synthesis of Graphene, Graphene oxide and reduced Graphene Oxide1.3. Properties of Carbon nanomaterials1.4. Conclusion and perspectives of carbon nanomaterials2 Application of carbon-based nanomaterials for removal of biologically toxic materials2.1 Introduction2.2 Application for the removal of biologically toxic materials2.2.1 Removal of biologically toxic materials using carbon nanoparticles2.2.2 Removal of biologically toxic materials using carbon nanotubes2.2.3 Removal of biologically toxic materials using Graphene/Graphene Oxide/reduced Graphene Oxide2.3 Conclusion3. Application of carbon-based nanomaterials as optical and electrical biosensors3.1 Introduction3.2 Application for Biosensor3.2.1 Bio-sensor using carbon nanoparticles3.2.2 Bio-sensor using using carbon nanotubes3.2.3 Bio-sensor using using Graphene/Graphene Oxide/reduced Graphene Oxide3.3 Conclusion4 Application of carbon-based nanomaterials as Bio-imaging probe4.1 Introduction4.2 Application for bio-imaging probe4.2.1 Bio-imaging probe using carbon nanoparticles4.2.2 Bio-imaging probe using carbon nanotubes4.2.3 Bio-imaging probe using Graphene/Graphene Oxide/reduced Graphene Oxide4.3 Conclusion5. Application of carbon-based nanomaterials as drug and gene delivery carrier5.1 Introduction5.2 Application in drug and gene delivery5.2.1 Bio-distribution and drug/gene delivery using carbon nanoparticles5.2.2 Bio-distribution and drug/gene delivery using carbon nanotubes5.2.3 Bio-distribution and drug/gene delivery using Graphene/Graphene Oxide/reduced Graphene Oxide5.3 Conclusion6. Biosafety of carbon nanomaterials6.1 Introduction6.2 Origin of toxicity6.2.1 Small size6.2.2 Solubility6.2.3 Easy entry into body6.3 Review of toxicity study6.4 Conclusion