Self Assembly of Nano Metric Metallic Particles for Realization of Photonic and Electronic Nano Transistors

Abstract

In this paper, we present the self assembly procedure as well as experimental results of a novel method for constructing well defined arrangements of self assembly metallic nano particles into sophisticated nano structures. The self assembly concept is based on focused ion beam (FIB) technology, where metallic nano particles are self assembled due to implantation of positive gallium ions into the insulating material (e.g., silica as in silicon on insulator wafers) that acts as intermediary layer between the substrate and the negatively charge metallic nanoparticles.

Electrospun PLGA–silk fibroin–collagen nanofibrous scaffolds for nerve tissue engineering

“…Nanoscaled scaffolds can mimic the structure of extracellular matrix (ECM), which can provide a suitable environment to support cell regeneration (Zhang et al 2007;Sill et al 2008;Ashammakhi et al 2009). Nanofibrous scaffolds can be fabricated through many ways, such as template synthesis (Bechara et al 2010), solvent casting (Ahmed et al 2010), phase separation (Liu et al 2010), self-assembly (Shahmoon et al 2010), and electrospinning (Zhang et al 2007;Kumbar et al 2008;Sill et al 2008). However, electrospinning is the most popular method as it can produce the scaffolds rapidly and efficiently.…”

Hybrid optically and electrically controllable field effect transistor based on manipulated nanoparticles

“…The nanoparticles are negatively charged as part of their fabrication process and therefore by applying voltage of a few volts across it, a movement of the nanoparticle can be achieved. 10 Figure 1(b) shows the conceptual sketch of the device where the position of the nanoparticles along the air gaps is controlled by an external light beam. The idea is that each nanoparticle along the air gap, inside a special multimode interference (MMI) region of the silicon waveguide, is controlled by the electric field intensity differences of the two externally input waveguides appearing on the left-and right-hand sides of the red MMI structure (indicated by two arrows).…”

“…According to the method reported in Ref. 10, assembly of the nanoparticles into an insulating material is achieved by accelerating concentrated positive gallium ions (Ga + ) into an insulating medium.…”

“…9 In order to cascade those aforementioned devices, a unique mass production method for assembling nanoparticles into a specific area on the chip has been developed. 10 In this paper we present a new type of transistor where one can control the shape of the current-voltage (I-V) curve using a special arrangement of metallic nanoparticles. This curve is determined by replacing the gate contact with a special structure of nanoparticles that, according to the position of the nanoparticles inside the structure, a different I-V curve is obtained.…”

“…The deposition of the nanoparticle, into the structure area inside the gate structure, is performed by the self-assembly concept which is based on FIB technology. 10 The tunabilty of the nanoparticles is performed by an external electric field or by using a special type of optical tweezers. In the electrical case, the external electric command is perpendicular to the data channel of the device, where both the data, as well as the tunability commands, are electrical.…”