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Arturo Benitez Roosevelt High School North East Independent School District Sy-Bor Wen Department of Mechanical Engineering, Texas A&M University, College Station The research question is … Analysis of nano-patterning through near field effects with femtosecond and nanosecond lasers on semiconducting and metallic targets How do we control short burst at close proximity lasers to create nano-patterning and geometric patterns? 1. What is the societal need that the research is trying to address? Make things smaller 2. What is the bottleneck that lead to the research? Rayleigh diffraction theorem < λ/2 The science at the nano-scale works differently. 3. What is the Research Question? How do we manufacture, design and engineer materials in the nano-scale. Dr. Wen is interested in designing and conducting experiments in micro to nano- scale energy transfer and mass removal along with constructing theoretical analyses to explain and predict experimental results. Theoretical and experimental analysis of nano-scale near-field enhancement effects and the related heat and mass transport Multi-time (nanoseconds to milliseconds) and length (micrometers to millimeters) scales analysis of the energy and mass transport during laser ablation Theoretical analysis of the radiative heat transfer of laser induced plasmas and the application to chemical analysis Theoretical analysis of nano-particle generation during laser ablation Education Ph.D. Mechanical Engineering, University of California at Berkeley, CA 2006 M.S. Mechanical Engineering, National Taiwan University, Taipei, Taiwan, 1999 B.S. Mechanical Engineering, National Taiwan University, Taipei, Taiwan, 1997 Background 2007-present Texas A&M University, College Station, TX Assistant Professor 2006-2007 Lawrence Berkeley National Laboratory, CA Postdoctoral Fellow in Environmental Energy Technologies Division Studying nano-scale laser ablation, patterning and their applications in chemical analysis 2003-2006 Lawrence Berkeley National Laboratory, CA Graduate Student Researcher in Environmental Energy Technologies Division Laser processing with ultrahigh speed pulsed laser Chemical analysis with laser induced plasma Nano-material generation with laser ablation Nano-scale energy and mass transport with near field effects From Wikipedia Light Amplification by Stimulated Emission of Radiation (LASER or laser) Laser ablation is the process of removing material from a solid or liquid surface by irradiating it with a laser beam. Nano-photonics or Nano-optics is the study of the behavior of light on the nanometer scale. Nano- (symbol n) is a prefix in the metric system denoting a factor of 10−9 or 0.000000001. – Nanometre, one billionth of a meter – Nanosecond, one billionth of a second potential in nano-machining nano-optical surgery Nano-chemical analysis Objective: There has been a push in our society to make items smaller and faster into the nano-scale. Nano research is difficult because you must shrink an object without destroying it. Current science is not adequate enough to see beyond less than λ/2 with a traditional refractive lens. With this limitation, we can not proceed with nano-science and nano-engineering less than 10-100 nm resolution. Nano research is difficult because you must shrink an object without destroying it. Current science is not adequate enough to see beyond less than λ/2 with a traditional refractive lens. With this limitation, we can not proceed with nano-science and nanoengineering less than 10-100 nm resolution. The research team is using an apertured near-field scanning optical microscope (NSOM). Apertured (NSOM) does not have the limitations of far field diffraction like traditional optical devices. With the NSOM, you can achieve chemical and bio studies along with nanolithography. Researchers may also be able to create nano-scale direct patterening with NSOM probes. Generating differing types of nano-particles – Using laser ablation Using thermal reflectance as a non-contact measuring tool to find temperature – Via time resolved interferometry Determining the effectiveness of a zone plate as a lead into creating nano-optic devices – Experimental research in nano-patterning By changing target material combination to generate different nano-particles and laser parameters with different background gas. Using an electron microscope to analyze the results; to determine the contribution of physical parameters on the size and shape of nano-particles. The research team takes the theoretical and runs experiments to get a favorable result. Once this process is refined, researchers can have a working model that can be applied in the field. Research can be defined as the search for knowledge or any systematic investigation to establish. Wisdom is a deep understanding and realizing of people, things, events or situations, resulting in the ability to choose or act to consistently produce the optimum results with a minimum of time and energy. Wisdom is comprehension of what is true or right coupled with optimum judgment as to action. Pool geometry? World Cup laser game Mirrors Protractors Graph paper Align laser pointer to bounce off mirrors to score a GOOOOOOAL The Dwight Look College of Engineering Texas A&M University The National Science Foundation Chevron Texas Workforce Commission Nuclear Power Institute