BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:iCalendar-Ruby BEGIN:VEVENT CATEGORIES:Lectures & Presentations DESCRIPTION:The Physics & Astronomy Colloquium Series presents Dr. Eric Sti naff of Ohio University discussing “Size Matters: Opto-electronic Studies o f Nanostructured and Atomically Thin Materials" on Sept. 3.\n\nJoin on your computer or mobile app \n\nClick here to join the meeting Or call in (audi o only) +1 614-706-6572\,\,68660872# United States\, Columbus Phone Con ference ID: 686 608 72# Find a local number | Reset PIN\n\nColloquia are Fr idays at 4:10 p.m.\n\n \n\nStinaff is associate professor of Physics & Astr onomy at Ohio University and director of the Nanoscale Quantum Phenomena In stitute (NQPI). \n\n \n\nAbstract: Our group investigates the optical and e lectronic properties of novel semiconductor nanomaterials\, nanostructures and nanostructure-based devices. An early focus of our research was on quan tum dots (QDs)\, nanoscale crystals whose dimensions are on the order of th e size of the charge carriers (e.g. electrons). As individual QDs are broug ht together they begin to display molecular behavior\, forming bonding and antibonding orbitals. This new class of coupled nanostructures has shown un ique properties such as tunable g-factors and the formation of anti-bonding ground states. I will describe results from our research into these artifi cial molecules including optical studies of single spins\, tunable luminesc ence lifetime effects\, and the ability to control processes such as the el ectron-hole exchange interaction. More recently our group has shifted focus to atomically thin\, two-dimensional (2D)\, materials. New 2D materials ar e consistently being reported with exceptional characteristics such as high mobilities\, semiconducting and superconducting behavior\, ferromagnetism\ , and excellent thermal properties. Additionally\, many of these materials exhibit spin and valley quantum degrees of freedom which may provide new ma terial-enabled functions in emerging areas such as spintronics and/or valle ytronics. I will review results from basic opto-electronics characterizatio n of these materials along with a novel growth process we have developed ba sed on the complementary growth of 2D semiconductors on\, and around\, bulk metal/metal-oxide patterns. This scalable process results in as-grown\, na turally contacted\, 2D materials-based devices. The technique has the added potential of producing self-contacted heterostructured devices as well as controllable doping of the 2D material using alloyed metallic contacts. The materials display strong luminescence\, monolayer Raman signatures\, and r elatively large crystal domains. Since the material grows controllably arou nd the lithographically defined patterns\, complex device structures and wa fer scale circuits can be envisioned. DTEND:20210903T210000Z DTSTAMP:20241124T114055Z DTSTART:20210903T201000Z LOCATION: SEQUENCE:0 SUMMARY:Physics Colloquium | Size Matters: Opto-electronic Studies of Nanos tructured and Atomically Thin Materials\, Sept. 3 UID:tag:localist.com\,2008:EventInstance_37024550329495 URL:https://calendar.ohio.edu/event/physics_colloquium_2d_and_optical_mater ials END:VEVENT END:VCALENDAR