**4. Application of graphene**

Comprehensive research in graphene's physical as well as chemical properties, has created a revolutionary in fields of electronics, energy storage devices, corrosion coating, etc. [32].

#### **4.1 Drug delivery**

Exploring various domains of graphene like biological one for enhancing its utility in biomedical field results as scientist's consistent effort in recent years. Free drugs leave defects intrinsically that comprises burst discharge, low blood circulatory span, irrelevant targeting. Therefore, it causes low therapeutic efficiency, lesser feasibility and variety of complexities [33]. Drug delivery server (DDS) is the ultimate need for alleviating these drawbacks. These DDS's have been used in various versions for last several decades as shown in **Figure 5**.

It simply encapsulates drug and commutes it to the desired destination, results as a controllable therapeutist [32].

#### **Figure 5.**

*Traditionally used DDS vehicles from several decades.*
