Education

Research Description

Micro/nanomanufacturing, high resolution 3D printing, micro-scale additive manufacturing, biomedical manufacturing, manufacturing optimization.

Honors and Awards

• Outstanding Paper Award, SME North American Manufacturing Research Conference (NAMRC), 2015
• Outstanding Paper Award (Honorable Mention), SME North American Manufacturing Research Conference (NAMRC), 2014
• IIE Dr. Hamed K. Eldin Outstanding Early Career Industrial Engineer in Academia Award, 2013
• Outstanding Young Manufacturing Engineer Award, Society of Manufacturing Engineers, 2012

Publications

Fabrication and electrical characterization of multi-layer capacitive touch sensors on flexible substrates by additive e-jet printing

Qin, H. T., Dong, J. Y., & Lee, Y. S. (2017), Journal of Manufacturing Processes, 28, 479-485.

Modeling of the dynamic machining force of vibration-assisted nanomachining process

Kong, X. C., Dong, J. Y., & Cohen, P. H. (2017), Journal of Manufacturing Processes, 28, 101-108.

Design, modeling and testing of integrated ring extractor for high resolution electrohydrodynamic (EHD) 3D printing

Han, Y. W., & Dong, J. Y. (2017), Journal of Micromechanics and Microengineering, 27(3).

Direct printing of capacitive touch sensors on flexible substrates by additive e-jet printing with silver nanoinks

Qin, H. T., Cai, Y., Dong, J. Y., & Lee, Y. S. (2017), Journal of Manufacturing Science and Engineering, 139(3).

Direct printing and electrical characterization of conductive micro-silver tracks by alternating current-pulse modulated electrohydrodynamic jet printing

Qin, H. T., Wei, C., Dong, J. Y., & Lee, Y. S. (2017), Journal of Manufacturing Science and Engineering, 139(2).

Direct printing and electrical characterization of conductive micro-silver tracks by alternating current-pulse modulated electrohydrodynamic jet printing

Qin, H. T., Wei, C., Dong, J. Y., & Lee, Y. S. (2017), Journal of Manufacturing Science and Engineering, 139(2).

AC-pulse modulated electrohydrodynamic jet printing and electroless copper deposition for conductive microscale patterning on flexible insulating substrates

Qin, H. T., Dong, J. Y., & Lee, Y. S. (2017), Robotics and Computer-Integrated Manufacturing, 43, 179-187.

AFM-based 3D nanofabrication using ultrasonic vibration assisted nanomachining

Deng, J., Zhang, L., Dong, J. Y., & Cohen, P. H. (2016), Journal of Manufacturing Processes, 24, 195-202.

Predictive modeling of feature dimension for tip-based nano machining process

Kong, X. C., Cohen, P. H., & Dong, J. Y. (2016), Journal of Manufacturing Processes, 24, 338-345.

Direct printing of capacitive touch sensors on flexible substrates by additive e-jet printing with silver nanoinks

Qin, H. T., Cai, Y., Dong, J. Y., & Lee, Y. S. (2016), (Proceedings of the ASME 11th International Manufacturing Science and Engineering Conference, 2016, vol 1, ).

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Grants

SNM: Continuous Vapor-Phase Processes for Nano-Functional Fibrous Materials Manufacturing

National Science Foundation (NSF)(12/01/13 - 11/30/17)

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SNM: Continuous Vapor-Phase Processes for Nano-Functional Fibrous Materials Manufacturing

Sponsor: National Science Foundation (NSF)

Start Date: 12/01/13

End Date: 11/30/17

Abstract

This project will develop the fundamental understanding and manufacturing science needed to transition this vapor-phase fiber surface modification technology from small-batch scale to a fully continuous manufacturing prototype.

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Investigation of Electrohydrodynamic 3D Printing for Super-Resolution Additive Manufacturing

National Science Foundation (NSF)(9/01/13 - 8/31/17)

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Investigation of Electrohydrodynamic 3D Printing for Super-Resolution Additive Manufacturing

Sponsor: National Science Foundation (NSF)

Start Date: 9/01/13

End Date: 8/31/17

Abstract

The objective of this proposal is to investigate a super-resolution (single micron-scale) electro-hydrodynamic (EHD) 3D printing process of melted thermoplastic polymers to achieve rapid manufacturing of customized military parts with limited material and manufacturing resources. The proposed process will overcome resolution barrier of most existing additive manufacturing approaches, and enable high precision production of complex part for austere environments with limited manufacturing infrastructure. This research is beneficial to additive manufacturing by significantly improving the accuracy and surface finish, and reducing the time and cost in post-processing, which will enable in-the-field rapid manufacturing of high precision military parts.

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Ultrasonic Vibration Assisted NanoMachining for High-rate Tunable 2D and 3D Nanofabrication

National Science Foundation (NSF)(9/15/12 - 8/31/16)

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Ultrasonic Vibration Assisted NanoMachining for High-rate Tunable 2D and 3D Nanofabrication

Sponsor: National Science Foundation (NSF)

Start Date: 9/15/12

End Date: 8/31/16

Abstract

The objective of this research is to investigate a low-cost high-speed tunable nanofabrication approach using sharp cantilever tips with the help of ultrasonic vibration. The controllable ultrasonic vibration of the tip enables tunable fabrication of features across a wide dimensional range with high efficiency. The proposed research will develop empirical models for the analysis of nanomachining process and its performance specifications (cutting force, form error, etc) with respect to process factors. This research will incorporate process development, processing modeling, and manufacturing system into a new framework that enables high-rate tunable fabrication of 2D and 3D nanoscale features.

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Collaborative Research: Defect Modeling and Process Optimization for Nanowire Growth Towards Improved Nanodevice Reliability

National Science Foundation (NSF)(9/01/11 - 8/31/15)

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Collaborative Research: Defect Modeling and Process Optimization for Nanowire Growth Towards Improved Nanodevice Reliability

Sponsor: National Science Foundation (NSF)

Start Date: 9/01/11

End Date: 8/31/15

Abstract

The objective of this research is to investigate a reliability-driven process-optimization methodology that streamlines the nanowire growth process for the mass production of high impact nanowire-based products, such as flexible electronics and nanoresonators, which demand high process yield and product reliability. The multidisciplinary team [University of Tennessee ? UT (Lead institution), North Carolina State University - NCSU, and University of Michigan ? UM] will incorporate nanowire (NW) defect modeling, nanomechanical characterization, and reliability prediction via accelerated testing (AT) into a new framework to enable the application-centric defect reduction for scalable nanomanufacturing. The fundamental questions to be answered are: (1) How to systematically establish the relationship between the process variables and the generation rates of different NW defects? (2) How to expedite the reliability prediction for NW-based devices and use the achieved reliability information to perform the application-centric defect reduction through the manipulation of the NW growth process? Specifically, we will (1) study the generation mechanisms of NW defects, and investigate appropriate stochastic models that link the generations and distributions of different defects to the NW growth-process variables; (2) develop a statistical fracture model for NWs with various defects under mechanical loading; (3) explore an advanced AT methodology and optimize the NW growth process by the design-of-experiment methods; and (4) conduct validation studies by developing two medium-sized (at least 10 cm × 10 cm) benchmark devices (i.e., flexible electronic devices and nanoresonators) based on the proposed methodology, and demonstrate their desired reliability performance.

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Regenerative Medicine Manufacturing Systems

NC Department of Commerce(11/30/-1 - 6/30/12)

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Regenerative Medicine Manufacturing Systems

Sponsor: NC Department of Commerce

Start Date: 11/30/-1

End Date: 6/30/12

Abstract

The project addresses the production of a new type of product ? the manufacture of human tissue and organs. The project consists of groups of domain experts at Wake Forest's Institute of Regenerative Medicine (WFIRM) and North Carolina State University's (NCSU's) College of Engineering that have come together to work collaboratively to assess, document and understand the current state-of-the-art for manufacturing regenerative medicine products. The primary focus of the proposed research is to use the knowledge base developed at WFIRM to define production requirements for the creation of tissue and organs and use those requirements to define and organize production systems that can produce living products safely, efficiently and affordably. The production system requirements will include: flow patterns, product requirements, process requirements (including FDA) and inventory and materials requirements. These components will be analyzed so that new system concepts for volume manufacture of tissues can be proposed. The manufacturing system design must be scalable to produce lots of size one efficiently and with appropriate quality and traceability in a cost effective manner while understanding the inventory and supply chain of this industry. The project will also address technological development requirements and other manufacturing system tools necessary for successfully achieving this vision.

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EAGER: Engineering for Regenerative Medicine

National Science Foundation (NSF)(3/15/11 - 5/31/13)

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EAGER: Engineering for Regenerative Medicine

Sponsor: National Science Foundation (NSF)

Start Date: 3/15/11

End Date: 5/31/13

Abstract

This project is focused on the initial bridging of two currently separate research domains one of regenerative medicine and one of manufacturing engineering. The Wake Forest Institute for Regenerative Medicine (WFIRM) is one of the leading research institutes in developing methods for growing replacement tissue and organs for human implantation. WFIRM and North Carolina State University's Department of Industrial and Systems Engineering (NCSU-DISE) seek to accelerate the translation from experimentally oriented production to commercially economical tissue and organ transplants. These two very different research partners will collaborate on initial research to transform experimental laboratory processes into the industrial processes necessary to enable economic production of regenerative medical products. The focus in this initial effort will be to translate the recipes and protocols used in the early production of regenerative tissue and organs into manufacturing engineering terms. The major result of this early bridging research will be translating the biology and medical requirements that have been developed at WFIRM for one specific organ into the kinds of engineering process definitions and resource requirements needed to develop full scale manufacturing. Formal engineering models that will explicitly define the resource requirements for the bio-reactors used to produce tissue and organs will be developed. Process models characterizing the transformations that take place outside as well as within the bio-reactors will also be developed. The intent of the formal model development is not simply to chart the current methods used to produce regenerative products but rather to define the basic transformations that take place as well as to try to identify early constraints on the resources and process methods used in their manufacture. These process models will then become a key resource in developing manufacturing system model of efficient production systems for regenerative products. Broader Impact: The impact of this far reaching. To cite Dan Barrett from Inside Higher ED (January 5, 2011), Advances in medicine and biotechnology -- from the sequencing of the human genome to the development of small chips to detect cancer in the bloodstream -- were driven largely by scientists coming together from diverse disciplines to work on common problems. But a blue ribbon panel said here Tuesday that these advances also signify something larger: the creation of a new model -- dubbed "convergence" -- in which engineering and physical sciences, among other disciplines, join forces with the life sciences. This project provides early convergence of regenerative medicine and manufacturing engineering, and establishes a foundation for a much more ambitious research agenda. Intellectual Merit: This proposal focuses on a critical health care issue facing the aging American population ? that is the critical problem of diseased tissue and organs that every year result in extraordinary medical expenditures, and that take thousands of lives. The merit of the research is bridging two very disparate disciplines so that major inroads into the development of economically practical and safe organ transplants can be made possible. This work will not resolve this problem but will provide the impetus and necessary knowledge base for further research.

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Bottom-Up Meets Top-Down - An Integrated Undergraduate Nanotechnology Laboratory at NC State

National Science Foundation (NSF)(1/01/11 - 6/30/13)

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Bottom-Up Meets Top-Down - An Integrated Undergraduate Nanotechnology Laboratory at NC State

Sponsor: National Science Foundation (NSF)

Start Date: 1/01/11

End Date: 6/30/13

Abstract

The Goal of this project is to develop an undergraduate nanotechnology laboratory in the College of Engineering at North Carolina State University (NCSU) that will provide undergraduate students with hands-on experience in nanoscale science and engineering. A focused theme of this NUE project is the integration of nanotechnology with microsystem technology, i.e., bottom-up meeting top-down. It will bridge the "pillars" of nanotechnology ? nanomaterials, nanofabrication, nanoscale characterization and nanodevices. This NUE project will develop a new laboratory course for engineering undergraduate students. This lab course will have an emphasis on size-dependent properties at the nanoscale, which is critical as new properties enable new applications. In addition to the new lab course, selected lab modules will be integrated to existing nanotechnology courses on campus. A new pedagogical approach that features active and inductive learning to culture and inspire creativity of undergraduate students will be adopted. Special efforts will be undertaken to attract minority and underrepresented groups to pursue engineering and science degrees. Overall this program will encourage more US students to pursue graduate study related to nanotechnology and to train a workforce for the emerging nanotechnology industry.

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Heterogeneously Integrated Micro-scale Flexible Manufacturing Systems for High-Throughput Versatile Nanomanufacturing

NCSU Faculty Research & Professional Development Fund(7/01/09 - 6/30/10)

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Heterogeneously Integrated Micro-scale Flexible Manufacturing Systems for High-Throughput Versatile Nanomanufacturing

Sponsor: NCSU Faculty Research & Professional Development Fund

Start Date: 7/01/09

End Date: 6/30/10

Abstract

The advances of nanotechnology over the last two decades have revolutionized emerging paradigm of nanoscale manufacturing. Essential to the success of nanomanufacturing is the high-throughput flexible manufacturing tools that can be configured to perform multiple nanomanufacturing processes over larger dimensional scales. Versatility, robustness and yield are critical issues for the nanomanufacturing systems used in nanomanufacturing applications. This proposal addresses the need for the high-yield versatile MEMS-based nanomanufacturing systems which feature heterogeneous integration of the high-bandwidth nano-positioner with variant types of manipulators, such as cantilevers, probes, deposition nozzles, etc., for robust high-throughput nanomanufacturing.

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A Configurable Platform for Multicantilever High-Throughput Nanoscale Metrology and Manufacturing (Subcontract from U of Illinois at U-C)

National Science Foundation (NSF)(7/01/08 - 6/30/12)

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A Configurable Platform for Multicantilever High-Throughput Nanoscale Metrology and Manufacturing (Subcontract from U of Illinois at U-C)

Sponsor: National Science Foundation (NSF)

Start Date: 7/01/08

End Date: 6/30/12

Abstract

The core promise of this proposal is innovative solutions to critical problems associated with a multicantileverbased systems and their integration into a comprehensive, yet flexible, platform for manufacturing and metrology at the nanoscale. New approaches and architectures for the control of spatial arrays of dynamic systems with local interaction are developed and applied to arrays of microcantilever systems. Novel parallel kinematics micro-electromechanical (MEMS) positioners are developed to enable a new capability - individual lateral positioning - of microcantilever array elements. Multi-dimensional robust control techniques, coupled with new approaches to simultaneous actuation-sensing of MEMS capacitance drives allow new levels of bandwidth, accuracy and robustness in positioning of the elements of such arrays. A platform framework is developed to integrate and leverage these new capabilities into a flexible system with the robustness to support a diverse set of operating conditions for high throughput high precision (nanoscale) investigation, metrology and manufacturing. The results of this project enable basic scientific investigation in combinatorial chemistry, combinatorial material investigation, and biological scanning applications in genomics and combinatorial drug discovery. Besides its direct impact on graduate education, the proposed project also fosters the synergistic transfer of know-how between the manufacturing, instrumentation/physical instrument, and control and dynamic systems research communities.

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