The New Design Nanocapsules from Interactions between Atoms and Carbon Nanotubes with End Caps

A massive interest has arisen in nanocapsule, and it is used in different fields. Carbon nanotubes and fullerene are the most commonly used nanomaterials due to their remarkable properties, such as optical, mechanical, electrical, and thermal properties. Especially in biomedical science, nanocapsules are highly recommended to be applied as carriers for drugs. From the Magic bullet theory, it is expected that the nanocapsules can deliver drugs to the target cells, which can reduce the side effects on the nontargeted cells. In this research, we design a new nanocapsule consisting of a finite-length single-wall carbon nanotube with two end caps which are hemispheres of C60 fullerene. By using elementary mechanics and mathematical modelling, we can determine the exact formulae and their numerical solutions of nonbonded interactions between the nanocapsules and the atoms Li, Na, K, Rb, Cs, Ca, Ni, Zn, and Pb which are assumed to be located in the middle of the nanocapsules. Therefore, the optimal lengths of the carbon nanotubes for each case of atoms are determined. This research is a guideline for studying the interaction between the drug and the nanocapsule in the drug delivery system.

Vibration Isolation

This chapter discusses vibration isolation of STM and AFM. First, the basic concepts of vibration isolation are illustrated by a one-dimensional system using elementary mechanics. The source of vibration, the environmental vibration, its characteristics, and methods of measurement are presented. The importance of vibration isolation at the laboratory foundation level and the proper mechanical design of STM and AFM are then discussed. The focus of this chapter in on the most important vibration isolation system: two-stage suspension spring with eddy-current damping. A detailed analysis of the two-stage spring system as well as aspects of practical design is presented. The principles and design charts for eddy-current damping system are discussed. Finally, the commercial pneumatic vibration isolation system is briefly discussed.

Advanced Mechanics of Solids

Build on the foundations of elementary mechanics of materials texts with this modern textbook that covers the analysis of stresses and strains in elastic bodies. Discover how all analyses of stress and strain are based on the four pillars of equilibrium, compatibility, stress-strain relations, and boundary conditions. These four principles are discussed and provide a bridge between elementary analyses and more detailed treatments with the theory of elasticity. Using MATLAB® extensively throughout, the author considers three-dimensional stress, strain and stress-strain relations in detail with matrix-vector relations. Based on classroom-proven material, this valuable resource provides a unified approach useful for advanced undergraduate students and graduate students, practicing engineers, and researchers.