IRGs

Two-dimensional electron gases (2DEGs) have been studied in III-V heterostructures for over two decades. In 1978, the innovation of modulation doping solved the problem of ionized donor scattering. Further development of […]

IRG Senior Participants:
Paul McEuen (co-leader, Phys), Jiwoong Park (co-leader, C&CB), Garnet Chan (C&CB), Harold Craighead (A&EP), Richard Hennig (MS&E), Jeevak Parpia (Phys), Keith Schwab (Phys), Michael Spencer (E&CE)
Collaborators: K. Ekinci (Boston Univ.), P. Kim (Columbia Univ.), B. Lane (Analog Devices), M. Zalalutdinov (NRL)
Our group is exploring the properties of atomic membranes: mechanically robust, freestanding […]

Controlling Electrons at Interfaces
IRG Senior Participants:
Hector Abruña (C&CB, co-leader), Dan Ralph (Phys, co-leader), Piet Brouwer (Phys), Robert Buhrman (A&EP), J. C. Séamus Davis (Phys), Paul McEuen (Phys), David Muller (A&EP), Sandip Tiwari (ECE), R. Bruce van Dover (MS&E)
Collaborators: G. Coates (Cornell); W. Harneit (Freie Universität Berlin); C. W. Kim, M. K. Kim (Samsung […]

Photonic Building Blocks from Multiscale Materials
Our group is working to understand and control the optical properties of a novel class of radiative nanoparticles—fluorescent core-shell silica nanoparticles (C dots)—that combine the tunability of organic dyes with the durability of inorganic materials to achieve brightness levels comparable to quantum dots. The fundamental correlation between structure and photonic […]

Dynamics of Growth of Complex Materials
IRG Senior Participants:
George Malliaras (MS&E, co-leader), David Muller (A&EP, co-leader), Tomás Arias (Phys), Jack Blakely (MS&E), Joel D. Brock (A&EP), Paulette Clancy (C&BE), James R. Engstrom (C&BE),
Collaborators: J. Anthony (U. Kentucky), D. Bowler (Univ. Coll. London), D. Dale (CHESS), R. Headrick (U. Vermont), A. Kazimirov (CHESS), H. […]

The mission of IRG-1 is to develop new synthetic and theoretical methodology that will allow the design, synthesis, and study of functional macromolecules with unparalleled architectural control. These molecules will be assembled to create new materials and nanoscopic structures with the goal of understanding the relationships among structure, property, and function in novel hydrogels, nanotemplates […]

The next generation of polymer-based materials will rely on the incorporation of multiple components to achieve superior and tunable properties; this, in turn, will require control over chemical connectivity and morphology from the nanometer scale up to microns. The thermodynamic incompatibility of most polymer pairs demands a flexible strategy for designing hybrid materials in both […]

The last decade has witnessed considerable progress in the development of organic semiconductors as an alternative to amorphous silicon for low cost, thin film electronics. The attractive properties of organic semiconductors- low temperature processability, efficient electroluminescence, and reasonable charge carrier mobilities- have led to expectations of a new ‘plastic’ electronics with applications ranging from flexible […]

The unifying theme of the Magnetic Heterostructures group (IRG 3) is to achieve a thorough understanding of spin transport, magnetization dynamics, and exchange coupling in materials with precisely defined and well-characterized interfaces, including those with tailored interfacial disorder. Magnetism is the basis for many present, near term, and future technologies, including magnetic read heads and […]

Engineered nanoparticles present a wide range of opportunities for the synthesis and assembly of materials with entirely new electronic, optical or mechanical properties. They are of interest for materials science because their size-dependent characteristics give rise to an entirely new spectrum of materials properties. In addition, nanoparticles offer new ways of forming combinations of very […]

The research themes of IRG3 focus on the electronic properties of confined systems. Ongoing projects include the study of superconducting and semiconducting nanowires, ferroelectric thin films and a new effort on graphene sheets. These activities are complemented by a synthetic effort in low dimensional nanostructures. This has been a productive year for this IRG with […]

In IRG1, Chemically Advanced Nanolithography, we exploit self- and directed assembly and selective chemistry in combination with conventional and other nanolithography tools to push forward fabrication techniques of devices with dimensions on the order and larger than 10 nm. The two inter-related research themes of this IRG are molecular rulers and chemical patterning. The emphasis […]

The IRG research projects are augmented by seed projects in materials science research. At present there are three seed projects in the CCMR funded through a combination of NSF and Cornell University resources.

IRG Leader: Ellen Williams
IRG-1 seeks to establish predictive structure-property relationships for low-dimensional interfaces of promising materials candidates for optoelectronic and nanoelectronic applications. Investigations on layered structures (metal chalcogenides and graphenes), organic molecular films (anthracene-, pentacenene-, and phthalocyanine-based), and confined structures (islands and dots) permit direct determination of interface structural dynamics […]

Senior Investigators:
Moungi G. Bawendi (group leader)
Raymond C. Ashoori
Rajeev J. Ram
Leonid S. Levitov
Marc A. Kastner

Research Goals: Modern electronics has provided the foundation for the scientific and technological advances of the last few decades but will soon face serious obstacles that may limit further miniaturization and development. Nanoscale elements, with properties dominated by quantum mechanics, are expected […]

IRG 2 designs and implements strategies for Hierarchically Assembled Molecular Materials, composed of molecular assemblies on surfaces that express novel function. Three synergistic themes develop functional organic and inorganic elements as well as general routes for their proximal assembly, leading to the creation of novel hierarchical materials with tailored chemical activity or, for more physical objectives, enhanced electronic, optical, or magnetic response. A new direction explores the self-assembly and electronic properties of self-assembled nanocrystal superlattices.