CAREER: Development of Novel Ternary Copolymer Assemblies Robert B. Grubbs, Dartmouth College, DMR 0239697 Linking chemically dissimilar polymer chains.

Slides:

Advertisements

Similar presentations

Search for Electron-Deficient Semiconducting Polymers to Rival Fullerenes Luping Yu, University of Chicago, DMR a b This project is aimed at developing.

Advertisements

Department of Chemistry and Biochemistry Guidance Counselor Advisory Board Winter Meeting December 4, 2009 Dean H. Johnston, Ph.D.

Organic Nanoparticles Ed Van Keuren, Georgetown University, DMR We have developed a novel method of characterizing nanoparticles in suspension.

Pathways of Formation of Polymer Coated Lipid-DNA Nanoparticles: Competing Electrostatic Attractions and Polymer Repulsions Cyrus R. Safinya, University.

REU Site: Characterization of Advanced Materials David F. Bahr, Washington State University, DMR Over the past 9 years, the School of Mechanical.

Stilbene based alternating copolymers exhibit semi-rigid backbones due to the steric crowding of the extra phenyl group (vis-à-vis styrene copolymers)

Our studies on stilbene based alternating copolymers show that the addition of the extra phenyl group (vis-à-vis styrene copolymers) enhances chain stiffness.

Thienothiophene based polymers for organic solar cell with highest efficiency Luping Yu, University of Chicago, DMR Efficient and cost effective.

Nanocrystallinity Engineering: Tailoring Properties and Functionalities of Metal Nanoparticles Min Ouyang, University of Maryland, DMR

We have demonstrated several successful outcomes to date: (1) Chemical protocols can be readily implemented for the production of elastomeric polypeptides.

Linking Intermetallics and Zintl Phases (DMR ) Gordon J. Miller, Iowa State University GOAL: establish structure-bonding-property relationships.

Figure 2. Directional crystal growth of polyethylene oxide (PEO) upon exposure to truncated intensity profile created the Iris diaphragm showing the spherulitic.

CARBON COMPOUNDS The Chemistry of Life. OBJECTIVES Define organic compound and name three elements often found in organic compounds. Explain why Carbon.

Fig. 1: Structure of metallo-supramolecular polymer formed by complexing a bifunctional ligand E5 with Zn(II) Metallo-supramolecular polymers, formed via.

Charge Photogeneration and Recombination in Organic Semiconductors, Lewis Rothberg, University of Rochester, DMR (with M. Rubner MIT MRSEC, T.

CAREER: Development of Novel Ternary Copolymer Assemblies Robert B. Grubbs, Dartmouth College, DMR Figure 1. (a) Synthesis, (b) transmission electron.

InP Aerogels: Porous Semiconductors Stephanie L. Brock, Wayne State University, DMR The exploitation of nanocrystals in solid-state devices requires.

This EAGER project is aimed at investigating the edge- on chemical gating effect on electronic properties of semiconducting molecules and materials. Three.

“Bottom-Up” Design of Nanostructured Conducting Polymer Thin Films Evgueni E. Nesterov, Louisiana State University & Agricultural and Mechanical College,

March 29, 2012 SUNY 2020 – Binghamton’s Energy Initiative A Harpur College Opportunity Professor Wayne Jones, Chemistry Department.

Figure 1. (a) SANS of responsive star PDMAEMA with increasing temperature, the solid lines represent model fitting. (b) Schematic representation of the.

High K Films: Organic Field Effect Transistors Using Self Assembled Barium Titanate Nanoparticles Stephen P. O’Brien, Columbia University, DMR

NIRT: Molecular Nanomagnets D.G. Naugle, G. Agnolet, F.A. Cotton, K.R. Dunbar, V. Pokrovsky, J.H. Ross, Jr. Texas A&M University — DMR : Fig. BFig.

Friction Laws for Dry Nanoscale Contacts Izabela Szlufarska (University of Wisconsin - Madison) DMR How does friction force depend on applied load.

EAGER: Chemical Design for Controlling Electronic Properties of Organic Semiconductors and Molecules via Edge-On Gating Luping Yu, University of Chicago,

REU Site: Program in Nanomaterials and Nanotechnology Ian Baker and Joe BelBruno, Dartmouth College, DMR Electron Counting for Quantum Measurements.

Multiscale Structures in Polymers and Nanocomposites Sanjeeva Murthy, Rutgers University, DMR The influence of hierarchical structure in polymers.

Proteins Containing Non-natural Amino Acids as Building Blocks for Novel Materials Kristi L. Kiick, University of Delaware, DMR Protein and peptides.

Systematic increase of chain stiffness, via polymer backbone steric crowding from stilbene incorporation, resulted in unique solution and solid state properties.

Template-Controlled Synthesis: Covalent Bond Formation Made Easy in the Solid State Leonard R. MacGillivray, University of Iowa, DMR Scientific.

Thrust 1 One thrust of our research is focused on the use of free radical alternating copolymerization to prepare families of precisely charged copolymers.

CAREER: Magnetic Imaging Guided Composite Materials Development Anna Cristina S. Samia, Case Western Reserve University, DMR Background: Every.

High Anisotropy Magnetic Nanoparticles and Nanocomposites G.C Hadjipanayis, University of Delaware Tel: (302) NSF MET DMR

2012 GREEN Center breakout session Nastassia N. Jones, Ph.D. Assistant Professor of Biology Philander Smith College 900 W. Daisy Bates Drive Little Rock.

We have advanced the methodologies that are available to access well-defined functional polymers by simple and versatile routes that involve the selective.

The use of polymer layers in light emitting devices has many applications in flexible devices and electronics, and relies on the ability of these polymers.

Self-Assembled Nanoparticle Array for Spintronics and High Frequency Materials DMR PI: Hao Zeng W.L. Shi, Y. Sahoo and Hao Zeng, et al., “Anisotropic.

The main goal of our project is to explore principles and develop strategies for transforming hydrogen-bonded multilayers into ultrathin highly functional.

Younan Xia (NSF Award Number: DMR ) Department of Chemistry, University of Washington Silver nanostructures are containers for surface plasmons.

Block Copolymers Block copolymers are a fascinating class of polymeric materials belonging to a big family known as ‘‘soft materials.’’ This class of polymers.

Directed Crystallization Precursor Structures in Polymers Benjamin S. Hsiao (Stony Brook University), DMR Using in-situ synchrotron SAXS techniques,

This research program addresses the investigation of conjugated polymer networks, a little-explored class of materials with interesting optic and electronic.

New Polyester Biomaterials: Design of Shape Memory Surfaces and Particles Valerie S. Ashby, University of North Carolina at Chapel Hill, DMR Present.

Search for Electron-Deficient Semiconducting Polymers to Rival Fullerenes Luping Yu, University of Chicago, DMR This project is aimed at developing.

Functional Polymers from Renewable Resources: Itaconic and Lactic Acids Samuel J. Huang and R. A. Weiss (University of Connecticut), DMR Biodegradable.

Exploiting geometry to generate anisotropic interactions at the nanoscale and self-assembly of living clusters Angelo Cacciuto, Columbia University, DMR.

Optoelectronic Supramolecular Block-Copolymer Assemblies Aided by Donor- Acceptor Interactions Alexander Sidorenko, University of the Sciences in Philadelphia,

Tandem Catalytic Polymerization as Efficient Method to Synthesize Organic Nanoparticles Zhibin Guan, University of California - Irvine DMR Highly.

Structure and Reactivity of Ferroelectric Surfaces: BaTiO 3 (100) Dawn A. Bonnell, University of Pennsylvania, DMR The orientation of ferroelectric.

Intellectual merit The goal of this project is to study the biomimetic properties of inorganic metal oxide nanoparticles in relation to their physicochemical.

Doped rare-earth manganese oxides (manganites) exhibit a wide variety of physical phenomena due to complex interplay of electronic, magnetic, orbital,

One-pot Synthesis of Dumbbell Polymers through Chain Walking Polymerization Zhibin Guan, University of California - Irvine DMR Figure 1. AFM images.

Studies on Polymer Glasses, Melts, and Solutions Jane E. G. Lipson, Dartmouth College, DMR A polymeric sample in the bulk is characterized, in.

Magnetic Interactions Between Mesoscopic Ferromagnetic Metallic Nanoparticles: Aftereffect Measurements and Preisach Modeling of Magnons Lawrence H. Bennett,

Synthesis of Janus Nanoparticles as Colloidal Amphiphiles Jeffrey Pyun, University of Arizona, DMR We have demonstrated the ability to make novel.

Block Liposomes from Curvature Stabilizing Lipids: Connected Nanotubes, -rods, or -spheres Cyrus R. Safinya, University of California-Santa Barbara, DMR.

The main goal of our project is to explore principles and develop strategies for transforming hydrogen-bonded multilayers into ultrathin highly functional.

Multilayered Anisotropic Microparticles Fabrication of Novel Functional Materials Eric Baer, Case Western Reserve University, DMR Researchers in.

Colloidal Polymerization of Ferromagnetic Nanoparticles into Cobalt Oxide Nanowires Jeffrey Pyun, University of Arizona, DMR We have developed.

CAREER: Development of Novel Ternary Copolymer Assemblies Robert B. Grubbs, Dartmouth College, DMR Linking chemically dissimilar polymer chains.

Yong Wang, Pennsylvania State University-University Park, DMR The objective of this INSPIRE project is to apply nature and biology as design guidelines.

Chapter 55 – CLUSTERING IN MACROMOLECULAR MEDIA 55:2. CHAIN END CLUSTERING 55:3. CLUSTERING DUE TO MONOMER STICKING INTERACTIONS.

General Chemistry C1403x, Fall 2004 M/W 1:10-2:25 PM Instructor: Nicholas Turro Office 655 Chandler Phone: 212.

Molecular Simulation of Disordered Materials under Stress Daniel J. Lacks, Case Western Reserve University, DMR Lightweight materials can be used.

University of Wyoming, Senior Honors Project, December 9, 2016

Photodecrease Photoincrease

Ordered Hybrid Polymer-Nanorod Composites for Renewable Energy

Electropolymerizable Dendrons in Reversible Addition Fragmentation Chain-Transfer (RAFT) Polymerizations: Electrochemical Behavior and Macromolecular Assemblies.

Polyelemental Nanoparticle Libraries

Flexible Optoelectronic Materials & Devices Lab

Presentation transcript:

CAREER: Development of Novel Ternary Copolymer Assemblies Robert B. Grubbs, Dartmouth College, DMR Linking chemically dissimilar polymer chains together into block copolymers generally leads to materials with nanometer-sized structures. We are attempting to use this behavior to locate multiple nanometer-scale metallic particles in polymer films. Alkyne- functional block copolymers have proven to effective for the localization of cobalt-functional polymer blocks to defined regions of a polymer film. Organization of cobalt- containing domains might allow the preparation of high capacity magnetic storage devices and materials with novel photonic and electromagnetic properties could result from organization of other metal particles. 1 We have examined systems resulting from reaction of alkyne-functional polymers and copolymers with cobalt clusters as precursors to cobalt nanoparticles. Copolymers with water-soluble poly(ethylene oxide (PEO) blocks lead to cobalt particles that form necklace-like structures (Figure 1a). Heating of gold nanoparticles with cobalt- functionalized polymer ligands leads to bimetallic particles (Figure 1b). We have also developed effective routes to prepare these polymers by coupling small molecules to polymer precursors (Scheme 1). 2 We are currently investigating the self-assembly of these materials and their magnetic properties. Scheme 1. 2 hours, 110 °C Figure 1. Transmission electron micrographs of (a) cobalt nanoparticles resulting from the heating of cobalt carbonyl- modified copolymers of PEO and alkyne-functional monomers and (b) cobalt carbonyl/alkyne-functional block copolymer-coated gold nanoparticles (cobalt-rich regions appear dark and gold nanoparticles appear darker). 1. Grubbs, R. B. J. Polym. Sci., Part A: Polym. Chem. 2005, 43, (DOI: /pola.20946) 2. Sessions, L. B.; Cohen, B. R.; Grubbs, R. B. Macromolecules 2007, 40, (DOI: /ma )

Education and Outreach: Five Ph.D. students, Laura Sessions (Ph.D., 2006), Yu Cai (6 th year), Anna Greene (2 nd year), and Addison Bouchard (2 nd year); one post-doc, Dr. Anand Sundararaman; one M.S. student, Qing Xia (M.S., 2006); two undergraduates, Kristen Limbach (’08) and Jeff Garber (’09); and one high school student, Natasha Kozliouk, are currently involved in this research. Jesse McCann (now a Chemistry Ph.D. candidate at U. Washington), Kjell Ericson, Jakub Wegrzyn (MS, Chemical Engineering Practice, MIT 2006), Benjamin Cohen (Johns Hopkins Medical School), and Gloria Sheng (MS program in Nano- and Microtechnology Enterprise, Cambridge; entering graduate school at Caltech in Fall 2007) prepared Honors Theses based upon their work in the lab as undergraduates at Dartmouth. Lindsey Saunders (Brandeis University), Ellen Robertson (Kalamazoo College), Ben Stokes (U. Wisconsin), Andy Wills (Carleton College), and Analiz Rodriguez (New College, FL) have participated in aspects of this research through the Dartmouth NSF-REU program in Molecular Materials. A recent group photograph (9/2006) appears to the right. From the left, Qing Xia, Anna Greene, Laura Sessions, Anand Sundararaman, Addison Bouchard Yu Cai, and Barney Grubbs are pictured. A graduate/upper-level undergraduate course in synthetic polymer chemistry (Chemistry 109) was offered in the fall of 2005 and the spring of An informal biannual meeting, the New England Polymer Chemistry Workshop, has been developed in collaboration with researchers in the greater geographical area. These workshops have provided professors, post-docs, graduate students, and undergraduates with regular opportunities to discuss their research with others and is leading to the development of collaborations across institutional lines. CAREER: Development of Novel Ternary Copolymer Assemblies Robert B. Grubbs, Dartmouth College, DMR