16 May 2011

New Molecular Spectroscopy Solutions to Improve Life Science Lab Capability and Productivity


Overview

From spectroscopic measurements of fast kinetic processes to plug-and-play versatility to robust and dependable hardware, Agilent meets your molecular spectroscopy needs. Hipp this interactive webinar, Agilent consequenceence specialists will discuss the newly released Cary 60 UV-Vis spectrometer, featuring unrivaled Xe flashlamp toolsfiber optic capabilities, productivity enhancing sampling techniques, and life science applications such as measuring micro-volume and cold (4oC) samples, which are more often than notten than not obstinate or ridiculous using usualng techniques.

With the acquisition of Varian, Agilent has greatly lengtheneded its molecular spectroscopy portfolio which nowadaysadays includes the 8453, the fastest PDA spectrometer able to purchasee an intact UV-Vis spectrum in under individualividual minute, the spankingnking Cary 60 utilizing best-in-class Xe flashlamp tools the Cary 4000 / 5000 / 6000i, the highest performing UV-Vis and UV-Vis-NIR spectrometers freeho mustttend?

UV-Vis, Molecular spectroscopy, Pharma, Biotech, Academic, Synthetic chemists, Organic chemists, biochemists, biomedical

General information Spectroscopy

In this study we performed photoelectron spectroscopy (XPS and UPS) to study the energy level alignment and the chemistry at the interface between P3HT and contact metals. The experiments were performed at the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory (PNNL), Richland, WA and the Laboratory for Surface Science & Technology at the University of Maine. Both polymer-on-metal and metal-on-polymer configurations of the polymer/metal interface were studied. In the polymer-on-metal configuration XPS and UPS measurements were conducted over bare metallic (Pt and Au) substrates. In the metal-on-polymer configuration the interface was studied by depositing Pt and Cu metals on top of the P3HT surface on monolayer by monolayer basis. XPS and UPS measurements were carried out after each deposition. The XPS results show that there is a chemical interaction between the metal (both Pt and Cu) and S from the backbone thiophene ring of P3HT chain. The UPS measurements in the metal-on-polymer configuration show the presence of negligible interfacial dipole as compared to a significant one in the case of polymer-on-metal configuration indicating that the energy level alignment is asymmetric depending upon the order of deposition of the metal and the polymer.


Publications:

K. A. Singh, P. Nachimuthu, Z. Yu, S. Thevuthasan, G. Bernhardt, R. Ladd and L. M. Porter, “Electronic and chemical nature of the interface between metals and poly(3-hexylthiophene) from ultraviolet and x-ray photoelectron spectroscopy”, (manuscript under preparation).





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