Research

 

Solution deposited films:

We are members of the Oregon based Center for Sustainability Materials Chemistry (CSMC). This Center explores new solution-based methods for producing very high-quality inorganic thin films for next-generation devices. One project we work on within the Center is to produce high sensitivity inorganic resists for lithography, starting from solution phase clusters. HafSOx [=HfO2–x(SO4)x] is one promising inorganic resist candidate for extreme UV photolithography. Both surface and thin film characterization has been performed to help better understand the growth, patterning and processing mechanisms. We employ a powerful range of tools for characterization.

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Group Leader: Feixiang Luo Group Leader: Mengjun Li

Collaborators: Center for Sustainable Materials Chemistry, Prof. Torgny Gustafsson

 

Ionic liquid Interfaces:

Ionic liquids (ILs) are intrinsic electrolytes with negligible vapor pressure, controllable electrical and ionic conductivity, and high stability. This project involves developing an atomic and molecular understanding of the solid/ionic liquid interface. The nature and strength of solid-IL bonding (and reactivity) is one key focus, while developing a structural understanding, including ionic ordering and preferential orientation is another. IL films are characterized using thermal desorption, photoelectron spectroscopy and various forms of microscopy. Applications such as IL gating are also being explored.

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Group Leader: Aleksandra Biedron

Collaborator: Prof. E. Castner

 

Electro- and photocatalyst development:

We are engaged in a new solar fuels project focusing on water splitting. We concentrate on careful synthesis and characterization of novel materials, and their incorporation into complex multicomponent photocatalysts. Cubic LiCoO2, which contains a cubic M4O4 core, is one promising catalyst we are examining for the oxygen evolution reaction (OER). We are fabricating novel OER materials and structures using pulsed laser deposition (PLD) and electrochemical deposition.

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Group Leader: Shinjae Hwang

Collaborators: Profs. G. C. Dismukes, M. Greenblatt

 

New materials for nanoelectronics:

We have worked on fundamental science of nanoelectronic materials, including high-K gate dielectrics, for two decades. Early work concentrated on Si, Ge and III-V channel materials, while recently we have focused on SiC, a promising semiconductor material for high-power, high-temperature applications. In SiC, we study the mechanism of nitridation and phosphidation as both N and P are found to significant lower the critical defect concentration that arises at the interface between SiO2 and SiC, resulting in a much higher mobility. Other device-related projects have involved ZnO, III-Vs, Ge, nanowires and Topological Insulators, and other oxides.

Collaborators: Profs. L. Feldman, T. Gustafsson

 

Carbon/organic based materials and devices:

We have several projects that involve carbon/organic based materials in electronics, photonics and other energy related applications. In most cases we focus on interface issues that are central in determining overall properties of the system. One project involves developing an understanding if the surface and interfaces of crystalline organics such as rubrene, a high mobility organic. We have several projects involving graphene including its exfoliation and functionalization, both essential in many applications. Another project has involved using polymers and polymer/inorganic hybrid materials for photovoltaic applications.

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Group Leader: Malathi Kalyanikar

Collaborators: Profs. H. He, E. Andrei, V. Podzorov, M. Chhowalla

 

Instrumental development for nanoscale materials analysis:

Rutgers has a strong team involved in instrument development, especially involving ion scattering and microscopy. Medium-energy ion scattering (MEIS) and Rutherford backscattering (RBS) are powerful ion beam based techniques for the determination of compositional and structural properties of surfaces and thin films. Rutgers teams are also developing next generation helium ion microscope (HIM) and scanning probe tools. We collaborate closely with these teams.

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Group Leader: Viacheslav Manichev

Collaborators: Profs. T. Gustafsson, L. Feldman, P. Batson, E. Andrei, R.A. Bartynski

 

Other projects:

  • Band alignment and electric field gradient metrology in dielectrics – Malathi Kalyanikar
  • Atomic Layer Deposition – Slava Manichev
  • Biological interfaces, nanotoxicity and sensors
  • Other Rutgers collaborators: Sylvie Rangan, KiBum Lee, Y. Lu, P. Falkowski

Eric Garfunkel