SANDIA REPORT Remotely Interrogated Passive Polarizing Dosimeter Remotely Interrogated Passive Polarizing Dosimeter (RIPPeD)

Abstract Conductive polymers have become an extremely useful class of materials for many optical applications. We have developed an electrochemical growth method for depositing highly conductive (~100 S/cm) polypyrrole. Additionally, we have adapted advanced fabrication methods for use with the polypyrrole resulting in gratings with submicron features. This conductive polymer micro-wire grid provides an optical polarizer with unique properties. When the polymer is exposed to ionizing radiation, its conductivity is affected and the polarization properties of the device, specifically the extinction ratio, change in a corresponding manner. This change in polarization properties can be determined by optically interrogating the device, possibly from a remote location. The result is a passive radiation-sensitive sensor with very low optical visibility. The ability to interrogate the device from a safe standoff distance provides a device useful in potentially dangerous environments. Also, the passive nature of the device make it applicable in applications where external power is not available. We will review the polymer deposition, fabrication methods and device design and modeling. The characterization of the polymer's sensitivity to ionizing radiation and optical testing of infrared polarizers before and after irradiation will also be presented. These experimental results will highlight the usefulness of the conductive infrared polarizer to many security and monitoring applications

Langmuir Film Formation on Deep Eutectic Solvents

Deep Eutectic Solvents (DES) are molecular mixtures similar to ionic liquids, having melting points below room temperature. However instead of being a salt, the mixture contains two molecules with strong H-bonding that hinder formation of an ordered crystalline network. DES share many features of ionic liquids (low vapour pressure, adjustable polarity, etc) which make them interesting as green solvents while being far less toxic than typical ionic liquids. There is also some evidence that DES may form within the crowded environment in cells and could assist in solubilizing biological species in an intermediate environment between that of the hydrophobic phospholipids and highly polar water rich regions. Here we wish therefore to study the interaction of phospholipids, common components of cell membranes, and synthetic lipids relevant to emulsification in Langmuir films at the air-DES interface to determine how they interact with DES and whether comparable interfacial structures are found to those formed on water

Langmuir Film Formation on Deep Eutectic Solvents

Deep Eutectic Solvents (DES) are molecular mixtures similar to ionic liquids, having melting points below room temperature. However instead of being a salt, the mixture contains two molecules with strong H-bonding that hinder formation of an ordered crystalline network. DES share many features of ionic liquids (low vapour pressure, adjustable polarity, etc) which make them interesting as green solvents while being far less toxic than typical ionic liquids. There is also some evidence that DES may form within the crowded environment in cells and could assist in solubilizing biological species in an intermediate environment between that of the hydrophobic phospholipids and highly polar water rich regions. Here we wish therefore to study the interaction of phospholipids, common components of cell membranes, and synthetic lipids relevant to emulsification in Langmuir films at the air-DES interface to determine how they interact with DES and whether comparable interfacial structures are found to those formed on water

ESI for "Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers"

This is the electronic supplementary information (ESI) associated with the publication "Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers". This ESI provides full details of the analyses performed in the work and access to an automated analysis workflow, through this we aim to provide better access to analysis reproducibility

Dataset for "Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers"

Reduced X-ray reflectometry dataset associated with Diamond Light Source experiment SI10526-1, and neutron reflectometry dataset associated with Institut Laue-Langevin experiment 9-13-612, used in the publication "Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers". The datasets are associated with the X-ray reflectometry of DLPC, DMPC, DPPC, and DMPG at the interface between a 1:2 mixture of choline chloride:glycerol and air, and the neutron reflectometry of DMPC and DPPC at the same interface (two isotopic contrasts)