MINT

Research topics     Publication (Journal)     Publication (Conference)     Invited Lectures     Patents     Funded Projects     Facilities    

A. High Performance Bio/Chemical & Physical Sensors based on Functional Nanostructures

  • Nanomaterials have unique material properties such as (1) quantum confinement and bandgap modulation (electrical), (2) high surface reactivitiy and surface-to-volume ratio (chemical), (3) high elastic modulus and fracture toughness (mechanical). Specifically, we are interested in the sensor applications of these functional nanomaterials and nanostructures (nanoparticle, nanowire, nanotube, and nanofilms). We develop (1) nanowire-based gas sensors, (2) nanostructure-enabled lab-on-a-chip systems, (3) nanostructure-based physical sensors (strain, force, and pressure), etc.
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Chemical Sensing Device: Top-down fabricated Silicon Nanowire Sensor Array for Real-time Chemical Sensing (Nanotechnology 21, 015501, 2010 - collaboration with HP Labs)

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Biosensing Device: Intracellular Biochemical Sensor based on Silicon Nanowires (Biosensors and Bioelectronics 22, 2054, 2007)

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Chemical Sensing Device: Selective Surface Functionalization of Nanowire Sensor Array (Nano Letters 7, 10, 2007 - collaboration with HP Labs)

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Physical Sensing Device: High-sensitivity Strain Sensor based on Metal Nanotubes (Manuscript in preparation - collaboration with Prof. S.W. Han @ KAIST)

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Physical Sensing Device: High-sensitivity / High-stability Flexible Photonic Sensors based on Functional Nanomaterials (Manuscript in preparation - collaboration with HP Labs)

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Physical & Chemical Sensing Device: Highly sensitive physical & chemical sensing device based on functional nanomaterials and analysis of thermal/fluidic phenomena (Manuscript in preparation)

B. Micro/Nanomanufacturing Processes and Systems

  • We develop a number of novel technologies to fabricate nanostructures and nanodevices with high controllability, repeatability, and reliability with low-cost, low-energy, and high-throughput processes. Specifically, we develop (1) controlled nanostructure synthesis process, (2) direct printing-based micro/nano-patterning process, and (3) top-down / bottom-up hybrid nanofabrication processes, etc
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Self Assembly Process: Ultrafast Self-Assembly of Microscale Particles based on Open-Channel Flow (Langmuir 26, 4661, 2010 - collaboration with UC Berkeley)

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Nanofabrication/Manufacturing System Design: Module-type Nanoimprinting Lithography System (Nano Letters 8, 3865, 2008 - collaboration with HP Labs) and Micro-contact Printing System (Manuscript in preparation)

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Hybrid Nanomanufacturing Process: Top-down/Bottom-up Hybrid Nanofabrication of One Dimensional Nanomaterials for Physical/Chemical Sensing (Manuscript in preparation- collaboration with HP Labs)

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Flexible Electronics Fabrication Process: Direct Micro/nanopatterning of Functional Nanomaterials for Flexible Electronics Fabrication (Manuscript in preparation)

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Direct Nanoimprinting for Flexible Devicess: Direct Nanoimprinting-based Patterning of Flexible Nanoelectronic Systems (Nano Letters 7, 1869, 2007 & i>Advanced Materials 20, 489, 2008)

C. Mechanics & Reliability of Micro/nanoscale Structures and Systems

  • Reliability is the ability of a system to perform and maintain its functions in routine or unexpected circumstances. Compared to the macroscale engineering systems, the reliability of micro/nanostructures and devices has not been studied extensively. Further, the standard and analysis tools have not been well-established in the micro/nanoscale reliability. In our group, we develop (1) experimental procedures and equipment for mechanical properties of nanostructures and devices, (2) failure analysis of nanostructured materials, (3) long-term reliability of nanomaterials and devices, etc.
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Reliability Testing of Flexible Electronics Devices: Direct Micro/nanopatterning of Functional Nanomaterials for Flexible Electronics Fabrication (Advanced Materials 20, 489, 2008)

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Fatigue Testing of Printed Electronics: Fatigue testing and electro-mechanical analysis of printed electronics structures & devices (Manuscript in preparation- collaboration with Prof. S.B. Lee @ KAIST and Prof. J. Vlassak @ Harvard)