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Research Overview

 

Nanomanufacturing, as one of the everlasting themes in the field of nanotechnology and nanoscience development, can not only power the continuing advance of our ability to engineer ever smaller devices and systems, but also enable our expanded capability in scientific study of things at ever smaller scales.

Many advanced micro and nanomanufacturing tools and techniques, excluding the chemical synthesis based methods, have been developed and used in a wide range of applications, such as photolithography, e-beam lithography, e-beam or focused ion beam-based local deposition and cutting, ink-jet printing, MEMS micromachining, X-ray and UV LIGA, holographic lithography, electrospinning, robocasting and dip pen nanolithography.   However, these existing fabrication technologies, either require expensive facilities and high vacuum environment, or fabricate only 2-D surface patterns, microscale, periodic or low aspect ratio structures.

It is desirable to acquire a technology that is capable of flexibly fabricating complex 3-D structures down to nanoscale precision in a controlled manufacturing process. Fabricating 3-D structures with nanoscale features presents the ultimate challenge, and accomplishing this in an ambient environment can significantly expand the scope of nanomanufacturing for broad scientific and practical applications.

As a representative additive manufacturing technology, 3-D printing offers the ultimate flexibility, through a layer-by-layer digitally controlled printing process, in fabricating 3-D models and custom parts with structural and mechanical complexities that are unmatched by the traditional machining process.  Current 3-D printing technology, however, can only work with some selected materials and its spatial resolution is limited to around tens of micrometers by the inherent processes and mechanisms.   It would be the dream in manufacturing if such a process could be extended to fabricating 3-D structures with nanoscale resolution and from a broad choice of engineering materials.  This would allow the development of truly heterogeneous materials architectures that significantly maximize materials performance and broaden materials functionality by the way of nanostructuring and nanosystem integration.   To achieve that requires the significant effort and ingenuity in breakthrough development of unconventional tools, methods, mechanisms and systems that are capable of integrated processing materials at the nanoscale.

The Nanomanufacturing Science and Technology Group in Georgia Tech focuses on the scientific exploration and technology development related to 3-D nanomanufacturing.  The group is further involved in the broadened development of unconventional electronic, MEMS, bionanotechnological and metrological devices and systems enabled by the new 3-D nanomanufacturing capabilities.

The research in the group has been supported by the funding from the National Science Foundation (CBET0304132, CMMI0324643, CMMI0328162, CCF0404001, ECCS0501495, CCF0508416, CMMI0600583, CMMI0726878, CBET0731096, CBET 0933223, CMMI1000615 and CMMI1131695), the Grainger Foundation, the Office of Naval Research, Industrial sponsors, University of Illinois at Urbana-Champaign and the Georgia Institute of Technology.

 

Representative Publications:

1.          Jie Hu and Min-Feng Yu, Science, Meniscus Confined Three Dimensional Electrodeposition for Direct-Writing of Wire Bonds, 329, 313-316(2010).

2.          Hanna Cho, Min-Feng Yu, Alexander F. Vakakis, Lawrence A. Bergman, and D. Michael McFarland, Nano Letters, Tunable and Broadband Nonlinear Nanomechanical Resonator, 10, 1793-1798(2010).

3.          Majid Minary-Jolandan and Min-Feng Yu, ACS Nano, Uncovering Nanoscale Electromechanical Heterogeneity in the Subfibrillar Structure of Collagen Fibrils Responsible for the Piezoelectricity of Bone, 3, 1859-1863(2009).

4.          Kyungsuk Yum, Sungsoo Na, Yang Xiang, Ning Wang and Min-Feng Yu, Nano Letters, Mechanochemical Delivery and Dynamic Tracking of Single Fluorescent Quantum Dots in the Cytoplasm and Nucleus of Living Cells, 9, 2193-2198(2009).

5.          Zhaoyu Wang, Jie Hu, A. P. Suryavanshi, Kyungsuk Yum and Min-Feng Yu, Nano Letters, Voltage generation from individual BaTiO3 nanowires under periodic tensile mechanical load, 7, 2966(2007).

6.          Zhaoyu Wang, Jie Hu and Min-Feng Yu, Appl. Phys. Lett., One-dimensional ferroelectric monodomain formation in single crystalline BaTiO3 nanowire, 89, 263119(2006).

7.          A. P. Suryavanshi and Min-Feng Yu, Appl. Phys. Lett., Probe-based electrochemical fabrication of freestanding Cu nanowire array, 88,083103(2006).

8.          Kyungsuk Yum and Min-Feng Yu, Phys. Rev. Lett., Surface-mediated liquid transport through molecularly thin liquid films on nanotubes, 95, 186102(2005).

9.          H. Jiang, M-F Yu, B. Liu and Y. Huang, Phys. Rev. Lett., Intrinsic Energy Loss Mechanisms in a Cantilevered Carbon Nanotube Beam Resonator, 93, 185501 (2004).

10.       Min-Feng Yu, Bradley S. Files, Sivaram Arepalli, Rodney S. Ruoff, Phys. Rev. Lett., Tensile loading of ropes of single wall carbon nanotubes and their mechanical properties, 84, 5552-5555(2000).

11.       Min-Feng Yu, Oleg Louire, Mark J. Dyer, Katerina Moloni, Thomas F. Kelly, Rodney S. Ruoff, Science, The strength and breaking mechanism of multiwalled carbon nanotubes under tensile load, 287, 637-640(2000).

12.       Min-Feng Yu, Mark J. Dyer, George D. Skidmore, Henry W. Rohrs, XueKun Lu, Kevin D. Ausman, James R. Von Ehr, Rodney S. Ruoff, Nanotechnology, Three-dimensional manipulation of carbon nanotubes under a scanning electron microscope, 10(3), 244-252(1999).

13.       Xuekun Lu; Min-Feng Yu; Hui Huang, Rodney S. Ruoff, Nanotechnology, Tailoring graphite with the goal of achieving single sheets, 10(3), 269-272(1999).