**4. Conclusion**

*21st Century Surface Science - a Handbook*

ent electrodes for certain applications [59].

**Nucleic acid/ drug-CNT type**

Radionuclide-SWCNT Burkitt

Toxic siRNA—MWCNT Human lung

compressive, flexural, tensile /torsional strain [60, 61].

lymphocytes

system

form to synthesize smart sensors and various multi-functional materials. They possess maximum aspect ratios that make the CNT to be extremely ideal for operating longer duration and of course continuous sensing. Their greater surface distribution shall be definitely exploited for providing material deposition in order to generate hybrid variety of functional materials or better functionalized to formulate differ-

CNTs are much prone to promote its ballistic conductivity which may occur owing to minimum scattering of electrons in their one dimensional solid structure containing mean free paths in the measurable range of tens to microns. The exerted mechanical stress/strain can even aid few reproducible changes acquainted with the electrical properties involved in CNT fibers, thereby felicitating it extremely viable to act as electro mechanical sensor devices. The occluded changes are noted as capacitance, inductance and electric resistance which can be directly correlated to the impact of strain **Figure 8**. Moreover, such CNTs are hugely responsive to

The working mechanism of sensors derived from a simple CNT macroscopic assembly inculcate the change of their electrical resistance or resistivity resulting from mechanical strain is said to be piezo-resistivity, change of its inductance/ capacitance via mechanical strain, variation of its electrical resistivity with a

**Cell/tissue Properties**

Cisplatin—SWCNT Neuro Carcinoma Tumor development—drastic recession

Doxorubicin—SWCNT Colon cancer Efficient take up of cancer causing cells and then

siRNA-SWCNT Human neuro cells Improves the working of siRNA assisted gastrin peptide receptor

Paclitaxel—SWCNT Breast cancer Improved efficacy in treatment with minimal effects

transfers to nucleus

Targeted tumor both in vitro/in vivo

Inhibits discrete tumor growth

**42**

**Figure 8.**

**Table 3.**

*Release of drugs from CNTs.*

*Nanosensor schematic representation.*

Nanomaterials provide an enriched knowledge on distinct probability and also definitely sound well in biomedical regenerative therapy for its uniqueness owing to its excellent physical as well as chemical properties. Thus, CNT both in modified and purified type have a definite potential of establishing promising applications in wide sectors of scientific fields. Perhaps, the prompt impregnation of other substituents in carbon nanoforms would confirm its strong perspective for their enhancing biomedical applications and in general medicine. Still then, there exist questions on unsolved issues whereas proximate homogeneity of the selected nanomaterial contains extensive distribution of nanotubes radius, unlike its geometric structures, classification of nanotubes, trace inclusion of residual elements, and a marked sensitivity to different species and other toxic gases.
