Presidency of George Washington. – Rhode Island ratifies the Constitution and becomes 13th state – The Bill of Rights, comprising the first ten amendments to the Constitution, is adopted.; – First Bank of the United States chartered – Vermont becomes the 14th state (formerly the independent Vermont Republic) – Kentucky becomes the 15th state (formerly Author: Joe Schall, College of Earth and Minerals Sciences, The Pennsylvania State University. This courseware module is part of Penn State's College of Earth and Mineral Sciences' OER Initiative. Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike Unported License.. The College of Earth and Mineral Sciences is Apr 24, · Cherie R Kagan Research Group. The Kagan group’s research is focused on studying the chemical and physical properties of nanostructured materials and in integrating materials with optical, electrical, magnetic, mechanical, and thermal properties for (multi-)functional devices
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We combine the flexibility of chemistry and bottom-up assembly with top-down fabrication techniques to design materials and devices. We explore the properties of materials and measure the characteristics penn state phd thesis devices using spatially- and temporally-resolved optical spectroscopies, AC and DC electrical techniques, electrochemistry, scanning probe and electron microscopies, and analytical measurements.
Jun has won the the SEAS Masters Award for Research and joined our group as a first-year PhD student in the Electrical and Systems Engineering Department. Congratulations to Yiyu Cai on receiving the John L. Margrave Thesis Award in recognition of an outstanding doctoral thesis in the Department of Chemistry from Rice University.
Guo, Jiacen; Kim, Ji-Young; Yang, Shengsong; Xu, Jun; Choi, Yun Chang; Stein, Aaron; Murray, Christopher B; Kotov, Nicholas A; Kagan, Cherie R. Broadband Circular Polarizers via Coupling in 3D Plasmonic Meta-Atom Arrays Journal Article.
ACS Photonics, Abstract Links BibTeX. Zhao, Qinghua; Gouget, Guillaume; Guo, Jiacen; Yang, Shengsong; Zhao, Tianshuo; Straus, Daniel B; Qian, Chengyang; Oh, Nuri; Wang, Han; Murray, Christopher B; Kagan, Cherie R.
Enhanced Carrier Transport in Strongly Coupled, Epitaxially Fused CdSe Nanocrystal Solids Journal Article. Nano Letters, 21 7pp. IoT4Ag: MEMS-Enabled Distributed Sensing, Communications, Penn state phd thesis Information Systems for The Internet Of Things For Precision Agriculture Conference.
Kagan, Cherie R; Bassett, Lee C; Murray, Christopher B; Thompson, Sarah M. Colloidal Quantum Dots as Platforms for Quantum Information Science Journal Article. Chemical Reviews, 5penn state phd thesis, pp. Kagan, Cherie R; Hyeon, Taeghwan; Kim, Dae-Hyeong; Ruiz, Ricardo; Tung, Maryann C; Wong, Philip H -S. Self-assembly for electronics Journal Article. MRS Bulletin, 45pp. Skip to content.
Announcements Welcome, Akhila! April 24, Akhila Mallavarapu has joined our group as a postdoctoral researcher. Congratulations to Qinghua on defending her PhD thesis! Congratulations to Han on defending his PhD thesis! Yun Chang Choi has joined our group as a first-year PhD student in the Chemistry department.
Research Highlights Guo, Jiacen; Kim, Ji-Young; Yang, Penn state phd thesis Xu, Jun; Choi, Yun Chang; Stein, Aaron; Murray, Christopher B; Kotov, Nicholas A; Kagan, penn state phd thesis, Cherie R Broadband Circular Polarizers via Coupling in 3D Penn state phd thesis Meta-Atom Arrays Journal Article ACS Photonics, Murray and Nicholas A. Kotov and Cherie R. By tuning the meta-atom array periodicity, hybridization originating from dipole—dipole and quadrupole—quadrupole interactions broadens the chiral response.
We demonstrate circular polarizers operating at wavelengths spanning 2. We report broadband circular polarizers achieved by engineering the electromagnetic coupling between 3D meta-atoms in large-area arrays. Straus and Chengyang Qian and Nuri Oh and Han Wang and Christopher B. Murray and Cherie R, penn state phd thesis. Here, we demonstrate sequential, solid-state cation exchange reactions to transform epitaxially connected PbSe NC thin films into Cu2Se nanostructured thin-film intermediates and then successfully to achieve zinc-blende, CdSe NC solids with wide epitaxial necking along {} facets.
Transient photoconductivity measurements probe carrier transport at nanometer length scales and show a photoconductance of 0. Atomic-layer deposition of a thin Al2O3 layer infiltrates and protects the structure from fusing into a polycrystalline thin film during annealing and further improves the photoconductance to 1. We fabricate field-effect transistors to study carrier transport at micron length scales and realize high electron mobilities of 35 3 cm2 V—1 s—1 with on—off ratios of after doping.
Strongly coupled, epitaxially fused colloidal nanocrystal NC solids are promising solution-processable semiconductors to realize optoelectronic devices with high carrier mobilities. Kagan and David P. Arnold and Mark G. Allen and Roy H. IoT4Ag aims to improve agricultural outcomes using highly distributed sensor technologies that monitor the soil and microclimate where plants are grown. MEMS will be a key technology enabler of this application, which requires sensing diverse measurands over large physical areas.
We introduce the US NSF Engineering Research Center for the Internet penn state phd thesis Things for Precision Agriculture IoT4Ag. Kagan and Lee C. Bassett and Christopher B. Murray and Sarah M. Quantum confinement effects facilitate wave function engineering to sculpt the spatial distribution of charge and spin states and thus the energy and dynamics of QD optical transitions. Colloidal QDs can be integrated in devices using solution-based assembly methods to position single QDs and to create ordered QD arrays.
Here, we describe the synthesis, assembly, and photophysical properties of colloidal QDs that have captured scientific imagination and have been harnessed in optical applications. We focus especially on the current understanding of their quantum coherent effects and opportunities to exploit QDs as platforms for quantum information science. Freedom in QD design to isolate and control the quantum mechanical properties of charge, spin, and light presents various approaches to create systems with robust, addressable quantum states.
We consider the attributes of QDs for optically addressable qubits in emerging quantum computation, sensing, simulation, and communication technologies, penn state phd thesis, e. Colloidal quantum dots QDs are nanoscale semiconductor crystals with surface ligands that enable their dispersion in solvents.
Kagan and Taeghwan Hyeon and Dae-Hyeong Kim and Ricardo Ruiz and Maryann C. Tung and H. Silicon electronics has relied on lithographic patterning of polymer resists at progressively smaller lengths to scale down device dimensions. Yet, this has become increasingly difficult and costly. Assembly of block copolymers and colloidal nanoparticles allows resolution enhancement and the definition of essential shapes to pattern circuits and memory devices.
As we look to a future in which electronics are integrated at large numbers and in new forms for the Internet of Things and wearable and implantable technologies, penn state phd thesis, we also explore a broader material set. Semiconductor nanoparticles and biomolecules are prized for their size- shape- and composition-dependent properties and for their solution-based penn state phd thesis and integration into devices that are enabling unconventional manufacturing and new device functions.
Self-assembly, a process in which molecules, polymers, and particles are driven by local interactions to organize into patterns and functional structures, is being exploited in advancing silicon electronics and in emerging, unconventional electronics.
Guo, Jiacen; Kim, Ji-Young; Yang, Shengsong; Xu, Jun; Choi, Yun Chang; Stein, Aaron; Murray, Christopher B; Kotov, Nicholas A; Kagan, penn state phd thesis, Cherie R Broadband Circular Polarizers via Coupling in 3D Plasmonic Meta-Atom Arrays Journal Article ACS Photonics, Zhao, Qinghua; Gouget, Guillaume; Guo, Jiacen; Yang, Shengsong; Zhao, Tianshuo; Straus, Daniel B; Qian, Chengyang; Oh, Nuri; Wang, Han; Murray, Christopher B; Kagan, Cherie R Enhanced Carrier Transport in Strongly Coupled, Epitaxially Fused CdSe Nanocrystal Solids Journal Article Nano Letters, 21 7pp.
Kagan, Cherie R; Arnold, David P; Allen, Mark G; Olsson, Roy H IoT4Ag: MEMS-Enabled Distributed Sensing, Communications, And Information Systems for The Internet Of Things For Precision Agriculture Conference IEEE 34th International Conference on Micro Electro Mechanical Systems MEMSIEEE Kagan, Cherie R; Bassett, Lee C; Murray, Christopher B; Thompson, Sarah M Colloidal Quantum Dots as Platforms for Quantum Information Science Journal Article Chemical Reviews, 5pp.
Kagan, Cherie R; Hyeon, Taeghwan; Kim, Dae-Hyeong; Ruiz, Ricardo; Tung, Maryann C; Wong, Philip H -S Self-assembly for electronics Journal Article MRS Bulletin, penn state phd thesispp.
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Ph.D. degrees are often earned by those who wish to enter the realm of research, leadership, or education in their chosen field. As this distinguished degree is very impressive, you can expect to exhibit hard work and dedication beyond your imagination. Earning a Ph.D. is not for the faint of heart! However, besides accomplishing your own personal goals, Ph.D. holders are dedicated to the Apr 24, · Cherie R Kagan Research Group. The Kagan group’s research is focused on studying the chemical and physical properties of nanostructured materials and in integrating materials with optical, electrical, magnetic, mechanical, and thermal properties for (multi-)functional devices Author: Joe Schall, College of Earth and Minerals Sciences, The Pennsylvania State University. This courseware module is part of Penn State's College of Earth and Mineral Sciences' OER Initiative. Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike Unported License.. The College of Earth and Mineral Sciences is
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