Molecular Optical Gating Devices Based on Polymer Nanosheets Assemblies

Abstract

We describe here a polymer nanosheet assembly that serves as a molecular photoswitching and optical exclusive OR (EXOR) logic gate. Separate polymer nanosheets (monolayers) containing phenanthrene, anthracene, and dinitrobenzene chromophore were prepared by the Langmuir-Blodgett technique (LB films). A bilayer-couple, consisting of phenanthrene (sensitizer) monolayer and dinitrobenzene (acceptor) monolayer, and the other couple, of anthracene monolayer and dinitrobenzene monolayer, were confirmed to function as a photodiode showing current rectification on light irradiation. The two photodiodes are connected as each photocurrent direction becomes opposite. In the polymer photodiode array (LB films), anodic photocurrent was observed when the anthracene was selectively excited. On the other hand, cathodic photocurrent was observed by selective excitation of the phenanthrene. Moreover, the output photocurrent displayed a very small value when the phenanthrene and anthracene were excited simultaneously. The performance is discussed for this gate's application to an optical EXOR logic gate.

Hydrothermal synthesis of microscale boehmite and gamma nanoleaves alumina

“…This property makes some nanosheets as promising high performance catalysts [3] and may provide new clues for various reactions at surface and interface localities [4]. They can also be used as building blocks to assemble layer-by-layer into some highlyordered superstructures [5], pillared structure with well developed mesoporosity [6], and functional nanostructures for various exciting applications [7,8]. Boehmite and its dehydrated alumina form are extensively used for preparation of various optical, electronic devices and catalysts [9][10][11].…”

Determination of Volatile Organic Compounds by a Novel Polymer Spin-Coated Thin Film and Surface Plasmon Resonance

“…Polymer thin films have an important role for technological applications such as electromechanics (Robert 1985;Zhang et al 2006;Konry et al 2008), biocompatible coatings (Subr et al 2006), novel drug delivery systems (Lynch, Gregorio, and Dawson 2005), chemical and biochemical sensors (Badr and Meyerhoff 2005;Park et al 2008), lenses (Sokuler and Gheber 2006), waveguides (Kim et al 2001), and other optical devices (Huang et al 2004;Matsui et al 2004). Polymers provide remarkable advantages in optical applications owing to their low cost, lightweight, durability, and practicality for making thin films using different techniques.…”

Fabrication of Large-area Free-standing Ultrathin Polymer Films

“…Free-standing thin polymer films are used in a variety of applications including sensors, [1][2][3] MEMs, catalysis or filtration, 4 and tissue engineering. [5][6][7][8] They are also used for fundamental studies exploring the behavior of polymers under confinement.…”