Helmholtz-Zentrum Berlin (HZB) 2 articles published in JoVE Biochemistry An All-in-one Sample Holder for Macromolecular X-ray Crystallography with Minimal Background Scattering Christian G. Feiler1, Dirk Wallacher2, Manfred S. Weiss1 1Macromolecular Crystallography (HZB-MX), Helmholtz-Zentrum Berlin, 2Department Sample Environment, Helmholtz-Zentrum Berlin A novel sample holder for macromolecular X-ray crystallography along with a suitable handling protocol is presented. The system allows crystal growth, crystal soaking and in situ diffraction data collection at both, ambient and cryogenic temperature without the need of any crystal manipulation or mounting. Chemistry Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix Trevor R. Martin1,2,3, Katherine A. Mazzio4, Hugh W. Hillhouse2,3,5, Christine K. Luscombe1,2,3,6 1Department of Materials Science and Engineering, University of Washington, 2Molecular Engineering and Sciences Institute, University of Washington, 3Clean Energy Institute, University of Washington, 4Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 5Department of Chemical Engineering, University of Washington, 6Department of Chemistry, University of Washington Herein we present a method to synthesize ligand-free cadmium sulfide (CdS) nanoparticles based on a unique sulfur copolymer. The sulfur copolymer operates as a high temperature solvent and a sulfur source during the nanoparticle synthesis and stabilizes the nanoparticles after the reaction.
