In particular, researchers have extensively studied SAMs on Au(111) sellckchem because they serve as model systems to understand the basic aspects of the self-assembly of organic molecules on well-defined metal surfaces. Also, great Inhibitors,Modulators,Libraries interest has arisen in the surface structure of thiol-capped gold nanoparticles (AuNPs) because of simple synthesis methods that produce highly monodisperse particles with controllable size and a high surface/Volume ratio. These features make AuNPs very attractive for technological applications in fields ranging from medicine to heterogeneous catalysis.
In Inhibitors,Modulators,Libraries many applications, the structure and chemistry of the sulfur-gold interface become crucial since they control the system properties. Therefore, many researchers have focused on understanding of the nature of this interface on both planar and nanoparticle thiol-covered surfaces.
However, despite the considerable theoretical and experimental Inhibitors,Modulators,Libraries efforts made using various sophisticated Inhibitors,Modulators,Libraries techniques, the structure and chemical composition of the sulfur gold interface at the atomic level remains elusive. In particular, the search for a unified model of the chemistry of the S-Au interface illustrates the difficulty of determining the surface chemistry at the nanoscale. This Account provides a state-of-the-art analysis of this problem and raises some questions that deserve further investigation.”
“Si-based inorganic electronics have long dominated the semiconductor industry. However, in recent years conjugated polymers have attracted increasing attention because such systems are flexible and offer the potential for low-cost, large-area production via roll-to-roll processing.
The state-of-the-art organic conjugated molecular crystals can exhibit charge carrier mobilities (mu) that nearly match or even exceed that of amorphous silicon (1-10 cm(2) V-1 s(-1)). The mean free path of the charge carriers estimated from these mobilities corresponds to the typical intersite (intermolecular) hopping Drug_discovery distances in conjugated organic materials, which strongly suggests that the conduction model for the electronic band structure only applies to mu > 1 cm(2) V-1 s(-1) for the translational motion of the charge carriers. However, to analyze the transport mechanism in organic electronics, researchers conventionally use a disorder formalism, where mu is usually less than 1 cm(2) V-1 s(-1) and dominated by impurities, disorders, or defects that disturb the long-range translational motion.
In this Account, we discuss the relationship between the alternating-current and direct-current mobilities of charge carriers, using time-resolved microwave conductivity (TRMC) and other techniques including field-effect transistor, time-of-flight, and space-charge limited current. TRMC measures the nanometer-scale mobility of charge carriers under an oscillating microwave Lenalidomide TNF-alpha electric field with no contact between the semiconductors and the metals.