Mechanical Engineering

Seung Ho Yang, Ph.D

Research Associate

National Institute of Standards and Technology (NIST),

*** ****** **. **** ****, Bldg. 220, Room A262

Gaithersburg, MD 20899-8230, USA

Tel.: 240-***-****,

e-mail: *************@*****.***

Profile

Working experiences for more than 7 years in both an industry (SAMSUNG) and a government lab

(National Institute of Standards and Technology, NIST)

Academic background: mechanical engineering, material science and metallurgical engineering.

Researcher, scientist, manager/engineer of reliability/ tribology, assistant project leader, technical Consultant,

Author of 32 peer-reviewed papers, 40 conference proceedings, 2 book chapters and 6 patents.

***Coatings & Surface Modifications (>15 years)

- Coating experiences: Company, Company projects and Academic research

- Coating thickness: from mm thickness to one molecular layer coatings

- Coating materials: Metals, Ceramics, Compounds, Composites, Polymers and Paints

- Coating methods: Physical vapor deposition (PVD), Chemical vapor deposition (CVD), Ion beam assisted deposition (IBAD), Plasma enhanced chemical vapor deposition (PECVD), Electro

plating, Thermal Spray (HVOF and APS), Sol-Gel coating, Molecular-level coating, Spray coating, Diffusion coating, Induction hardening, Carburising, Boronizing, Paste-based

diffusion coating, etc...

- Coatings for: Low friction and wear, Water proof, Corrosion resistance, Mechanical protection, Chemical protection, Electric insulation

- Applications: Automotive elements, Heavy duty machine elements, Computer Hard disk, Electronics and

microelectromechanical systems (MEMS)

- Testing methods

. Shape/dimension/size: confocal 3D microscope, SEM, optical microscope, stereo microscope

. Coating thickness: alpha step, SEM, elllipsometer,Profilometer and AFM

. Coating roughness: Profilometer, 3D confocal microscope and AFM

. Mechanical property: Micro Vickers indentor, Nanoindentor, AFM

. Chemical property: XPS, FT-IR, AES, XRD, Raman, EPMA, DEX etc.

. Adhesion of coating: Scratch testing, Tension testing (Instron or MTS)

. Fration wear & lubrication: Tribo testers, Micro-tribometers and AFM

. Corrosion testing: Salt water spraying test ( + tape peeling test)

. Toughness and shock absorbance: Sharpy V-notch testing

***Tribology, Surface Engineering & Failure Analysis of machine elements (> 7 years)

- Tribology research engineer at SAMSUNG (7 years)

- Fundamental research: contact mechanics, roughness, friction & wear mechanisms, material transfer

- Engine / Bearing / Ring Gears / Hydraulic Pump / Concrete

pumping element / Under carriage (sprocket, Idler & chains) /Bucket tooth / Pin & Bushing

- Wear life extension / wear life prediction / accelerated life testing

- Eliminate scoring, scuffing and delamination of sliding & rolling bearings

- Design modification / material selection / surface treatment

(induction hardening and carburizing) and coatings (thermal spry, PVD, CVD)

- Develop new lubricating mechanism / contact mechanics

- Field testing / accelerated field testing of prototypes

failure analyses (fracture, fatigue, scuffing, delamination & wear)

- Condition monitoring: wear particle monitoring & ferrography

- Solid lubricants, thin films & coatings for vacuum (space application) under various environments

- Data analysis, design of experiments, failure analysis, and

problem-solving

- Reliability testing, failure analysis (tribology, fatigue and fracture)

- Lab analysis: microscopes, indentors, AFM, SEM, TEM & specimen preparation etc...

***Micro & Nano tribology (7 years)

- Friction and adhesion mechanism at nano contact: thin films, carbon/DLS/diamond coatings, SAM and MEMS

- Micro adhesion and friction measurement using AFM and a custom made micro tribo tester

- Effect of nano roughness on contact & adhesion

- SAM (self assembled monolayer) for nano lubrication of MEMS

- In-depth study on the effect of nano capillary force on nano adhesion

- Develop AFM based surface force apparatus (SFA)

- Develop new mechanism to avoid "jump-to-contact" in AFM force measurement

- Develop atomically smooth colloidal probe tip for a very defined force measurement

- Experimental measurement on the negative pressure of nanoscale water bridge under tension

- Develop new stiffness calibration methods of the AFM cantilevers

- Apply contact mechanics theorems (JKR, DMT, etc) to suppress/eliminate adhesion & friction

- Study on the behavior of the generated wear particle: 3rd body theorem & material transfer

- Tribological damaging mechanism of carbon-coated surfaces under contact & friction

***MEMS design/3D modeling/Finite element analysis/fabrication/reliability testing (> 5 years):

- MEMS design and 3D modeling: IntelliMask Pro & SolidWorks

- Finite element analysis: ANSYS ( stress & strain / thermal /electric / mode (frequency) analysis

- Nanofabrication & semiconductor processing: Authorized user at NIST NanoFab (cleanroom)

- Measurement

: Atomic Force Microscope (AFM) / Confocal microscope

/Electroplating / SEM / TEM / 3D Confocal microscope / Optical microscope / Laser reflectance microscope / Tencor profilometer

- MEMS reliability

- Design, fabrication & testing for the following MEMS elements

: Sensors, actuators, grippers, micro-coils, nano-manipulator, micro-fluidic platform, micro-mirrors for free space beam steering, MEMS based nano-tension system for uniaxial tensile

testing of nanowires, and multi degree-of-freedom platform with sub-nano resolution

***Nanotechnology using AFM and MEMS (> 10 years):

- AFM nanoscale contact mechanics: tip radii, nano roughness, jump-to-contact & colloidal probe

- Nanomechanics: Intermolecular forces and nano-scale material property measurements

- AFM force measurement under air, N2, various relative humidity and ultra high vacuum

- Nanotribology: adhesion/friction/lubrication/wear at sub-nanometer scale

- AFM force measurement with DLC, Si, HOPG, SAM (self assembled monolayer), MEMS elements

- AFM based surface force apparatus (SFA)

- "MEMS + AFM" to yield solutions for unsolved imaging and measurement issues at nano- and subnano-scale

- AFM as a super sensitive measuring tool:

. Normal and lateral stiffness measurement of MEMS with AFM

. Pico movement & pico angle (degree) measurement of MEMS using AFM

***Capillary force, wetting control & Bio-mimetics (5 years):

- Lotus effect: ultrahydrophobicity & self-cleaning ability

- PTFE / ion-beam irradiated PTFE ( surface morphology control, Lotus effect)

- Self-assembled mono layer (SAM) for controlling wettability & capillary condensation

- Nano-roughness control using ion beam bombardment ( additional control on wettability

- Experimental measurement on internal pressure of a nanoscale capillary bride using AFM

- MEMS & Micro-chip design/fabrication for capillary-based devices

*Flexible electro-capacitive tomographic (ECVT) sensor fabrication (2 years)

- Soft-lithography: pattern transfer onto a thin metal coated polymeric sheet

- Commercial printer is used for the pattern transfer

- Regeneration of the 3D shape of liquid in an opaque container was very successful

- The 3D shape regeneration of a Styrofoam sphere (dielectric constant, 1.03) in air (dielectric constant, 1.00) was very successful.

Education

Ph.D, Mechanical Engineering, Yonsei University, ( 2nd best

University in South Korea)

MS, Mechanical Engineering, Yonsei University, ( 2nd best

University in South Korea)

BS, Metallurgical Engineering, Yonsei University ( 2nd best

University in South Korea)

Experience

1991 - 1998 Research Scientist, Materials Research Group, SAMSUNG.

1994 - 1996 Joint research projects between SAMSUNG and Russian Academy of Science.

1996 - 2002 Student Researcher, Korea Institute of Science and Technology (KIST).

2002 - 2003 Post Doctorial Research Fellow, KIST

2003 - 2007 Post-doctor, Nanomechanical Properties Group, MSEL, National Institute of

Standards and Technology (NIST)

2008 - present Research Associate, Intelligent Systems Div., NIST

Awards

1995 Winner of the "Excellent Korean Technology (KT Mark)award"

1996 Bronze medal winner of new technology award, SAMSUNG

2002 Academic Excellence Award, Korea Institute of Science and Technology

2002 Post-doctorial fellowship, KOSEF, Korean Government, South Korea.

2008 Affiliated member of American Society of Mechanical Engineers (ASME)

Dr. Seung Ho Yang was elected as a member of American Society of Mechanical

Engineers (ASME) in the year 2008. He has been serving as a reviewer for

many peer-reviewed journals; "Nanotechnology", "Journal of Micromechanics

and Microengineering", "Measurement Science and Technology", "Journal of

Physics D", "Philosophical Transactions of the Royal Society A" and

"Sensors and Actuators A".

Dr. Yang's the most recent paper entitled "Microelectromechanical system

based Stewart platform with sub-nano resolution" which appeared in "Appl.

Phys. Lett., vol 101 (2012") was featured in a magazine: MICRO

Manufacturing (http://www.readoz.com/publication/read?i=1052320#page46)

I. Recent Research Papers

1. S.H. Yang, H. Kong, E.-S. Yoon and O.-K. Kwon, "An Experimental

Study on the Rolling Resistance of Bearing Surfaces Covered by

Pure Silver Film", Journal of the Korean Society of Tribologists

and Lubrication Engineers, 13, No.3 (1997) 85-92.

2. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental

Study on the Rolling Resistance of Bearing Surfaces Coated by

Pure Tin and Zinc Films", Journal of the Korean Society of

Tribologists and Lubrication Engineers, 14, No.1 (1998) 1-6.

3. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental

Study of Environmental Effects on the Rolling Resistance of

Bearings Coated by Soft Metallic Films", Journal of the Korean

Society of Tribologists and Lubrication Engineers, 14, No.3

(1998) 1-6.

4. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental

Study on the Rolling Resistance of Silver-coated Films Modified

by Plasma Surface Treatments", Journal of the Korean Society of

Tribologists and Lubrication Engineers, 15, No.4 (1999) 321-327.

5. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental

Study on the Rolling Resistance of Bearings Coated by Pure

Silver", Wear, 229 (1999) 119-126

6. S.H. Yang, H. Kong, K.R. Lee, S. Park and D.E. Kim, "Effect of

Environment on the Tribological Behavior of Si-incorporated

Diamond-like Carbon Films", Journal of the Korean Society of

Tribologists and Lubrication Engineers, 16, No.3 (2000) 188-193.

7. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental

Study on the Effect of Wear Particles on the Sliding Behavior of

Silver-coated Bearing Steels", Journal of the Korean Society of

Tribologists and Lubrication Engineers, 17, No.3 (2001) 221-227.

8. E.-S. Yoon, J.H. Park, S.H. Yang and H. Kong, "A Study on the

Nano-adhesion and Friction at Different Contact Conditions using

SPM", Journal of the Korean Society of Tribologists and

Lubrication Engineers, 17. No.3 (2001) 191-197.

9. E.-S. Yoon, J.H. Park, S.H Yang, H.-G. Han and H. Kong, "An

Experimental Study on the Nano-adheson of

Octadecyltrichlorosilane SAM on the Si Surface", Journal of the

Korean Society of Tribologists and Lubrication Engineers, 17,

No.4 (2001) 276-282.

10. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "Effect of Silver

Particle Introduction on Rolling Friction", Journal of the Korean

Society of Tribologists and Lubrication Engineers, 17, No.6

(2001) 417-425.

11. S.H. Yang, H. Kong, S.C. Choi and D.E. Kim "The Effect of

Humidity on the Rolling Resistance of Silver Coatings Modified by

Plasma Surface Treatments", Wear, 249, Issue 9, September (2001)

780-787.

12. S.H. Yang, H. Kong, K.R. Lee, S. Park and D.E. Kim, "Effect of

Environment on the Tribological Behavior of Si-incorporated

Diamond-like Carbon Films", 2001, Wear, 252, Issues 1-2, January

(2002) 70-79.

13. E.-S. Yoon, J.H. Park, S.H. Yang, H. Kong and K.Y. Jhang,

"Nanotribological Chracteristics of Silicon Surfaces Modified by

IBAD", Journal of the Korean Society of Tribologists and

Lubrication Engineers, 18, No.1 (2002) 1-8.

14. E.-S. Yoon, H.-J. Oh, S.H. Yang and H. Kong, "Micro/nano

tribological and water wetting characteristics of ion beam

teasted PTFE surfaces", KSTLE International Journal, 3, No. 3

(2002) 12-16.

15. E.-S. Yoon, S.H. Yang, H. Kong and A.Y. Grigoriev, "Nano Adhesion

and Friction of DDPO_4 and ODPO_4 SAM Coatings", Journal of the

Korean Society of Tribologists and Lubrication Engineers, 18, No.

4 (2002) 267-272.

16. H.-G. Han, H. Kong, E.-S. Yoon and S.H. Yang, "Micro Friction and

Wear Characteristics of Organically Modified Hybrid Ceramic

Materials Synthesized by a Sol-Gel Process", Journal of the

Korean Society of Tribologists and Lubrication Engineers, 18,

No.5 (2002) 324-332.

17. H. Kong, S.H. Yang, E.-S. Yoon and D.E. Kim "A Study on the

Formation and the Tribological Role of Mass Transfers Layers at

Rubbing Silver-coated Surface" Journal of the Korean Society of

Tribologists and Lubrication Engineers, 18, No.6 (2002) 377-383.

18. E.-S. Yoon, S.H. Yang, H.-G. Han, H. Kong, "An Experimental Study

on the Adhesion at a Nano-contact", Wear, 254, No. 10 (2002) 974-

980.

19. S.H. Yang, H. King, E.-S. Yoon and D.E. Kim, "A Wear Map of

Bearing Steels Lubricated by Silver Films", Wear, 255, Part 2

(2003) 883-892.

20. E.-S. Yoon, S.H. Yang, H. Kong, S.-K. Koh, "Nanotribological

characteristics of plasma treated hydrophobic thin films on

silicon surfaces using SPM", Journal of the Korean Society of

Tribologists and Lubrication Engineers, 19, No.2 (2003) 109-115.

21. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "The Role of

Transfer Layer on the Tribological Characteristics of Silver-

coated Surfaces", Surface and Coatings Technology, 163 (2003) 457-

464.

22. E.-S. Yoon, S.H. Yang, H. Kong and K.H. Kim, "The Effect of

Topography on Water Wetting and Micro/Nano Tribological

Characteristics of Polymeric Surfaces", Tribology Letters, 15,

No. 2 (2003) 974-980.

23. S.H. Yang, "An Experimental Study on the Effect of Surface

Roughness on Nanoscale Adhesion", Journal of the Korean Society

of Tribologists and Lubrication Engineers, 21, No.1 (2005) 1-7.

24. S.H. Yang, H. Zhang and S.M. Hsu, "Correction of Random Surface

Roughness on Colloidal Probes in Measuring Adhesion", Langmuir,

23, No.3-200*-****-****.

25. S.H. Yang, H. Zhang, M. Nosonovsky and K.-H. Chung, "Effects of

contact geometry on pull-off force measurements with a colloidal

probe", Langmuir 24, no.3 (2008) 743-748.

26. S.H. Yang, H. Zhang, M. Nosonovsky and K.-H. Chung, "Nanoscale

water capillary bridges under deeply negative pressure", Chemical

Physics Letters, 451, Issue 1-3, (2008) 88-92.

27. S.H. Yang, M. Nosonovsky and H. Zhang, "Response to the comment

on 'Nanoscale water capillary bridges under deeply negative

pressure' by Caupin et al Chemical Physics Letters, 463,

Issue 1-3, (2008) 286-287.

28. S.H. Yang, Y. Kim, K.P. Purushotham, J.-M. Yoo, Y. Choi and N.

Dagalakis, "AFM characterization of nanopositioner in-plane

stiffnesses", Sensors and Actuators A 163 (2010) 383-387.

29. S. Avramov_Zamurovic, N.G. Dagalakis, R.D. Lee, J.M. Yoo, Y.S.

Kim and S.H. Yang, "Embedded capacitive displacement sensor for

nanopositioning applications", IEEE Transactions on

Instrumentation and Measurement, 60, No.7, (201*-****-****.

30. Young-Man Choi, Nicholas G. Dagalakis, Jason J. Gorman, Seung Ho

Yang, Yongsik Kim, and Jae Myung Yoo, "A high-bandwidth

electromagnetic MEMS motion stage for scanning applications", J.

Micromech. Microeng., Vol. 22, No. 10, pp. 105***-****** (2012).-

COVER ARTICLE.

31. Yong-Sik Kim, Jae-Myung Yoo, Seung Ho Yang, Young-Man Choi,

Nicholas, G. Dagalakis, Satyandra K. Gupta, "Design, fabrication

and testing of a serial kinematic MEMS XY stage for multifinger

manipulation", J. Micromech. Microeng. 22 (2012) 085029.

32. Seung Ho Yang, Yongsik Kim, Jae-Myung Yoo and Nicholas Dagalakis,

"Microelectromechanical system based Stewart platform with sub-

nano resolution", Appl. Phys. Lett., vol 101 (2012).

II. Conference Proceedings

1. S.H. Yang et al., "Surface Modification with Boron Diffusion Treatment

(written in Korean)", Proceedings of the Conference of Korean Society

of Metallurgists, autumn, 1993.

2. S.H. Yang et al., "The Effect of Surface Roughness on the Friction and

Wear Properties of Carbon Steels", Proceedings of the Conference of

Korean Society of Metallurgists, autumn, 1993.

3. S.H. Yang, B.J. Ryu, S.K. Kim, Y.S. Yoo and I.S. Yoo, "The Study on

the Tribological Characteristics of the MoS2 Bonded Film", Proceedings

of the 23rd Conference of Korean Society of Tribologists and

Lubrication Engineers, May, 1996, pp.122-127.

4. S.H. Yang, H. Kong, E.-S. Yoon and O.-K. Kwon, "An Experimental Study

on the Rolling Resistance of Bearing Surfaces Covered by Pure Silver

Film", Proceedings of the 25th Conference of Korean Society of

Tribologists and Lubrication Engineers, June, 1997, pp.101-110.

5. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental Study on

the Rolling Resistance of Bearing Surfaces Coated by Pure Tin and Zinc

Films", Proceedings of the 26th Conference of Korean Society of

Tribologists and Lubrication Engineers, December, 1997, pp.51-58.

6. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental Study of

Environmental Effects on the Rolling Resistance of Bearings Coated by

Soft Metallic Films", Proceedings of the 27th Conference of Korean

Society of Tribologists and Lubrication Engineers, June, 1998, pp.47-

54.

7. S.H. Yang, H. Kong and E.-S. Yoon, "The Changes in Rolling Resistance

of Bearing Surfaces Coated by a Soft Metallic Film", International

Symposium for High Performance of Tribosystem, Taegu, Korea, 1998,

pp.155-160.

8. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental Study on

the Rolling Resistance of Silver-coated Films Modified by Plasma

Surface Treatments", Proceedings of the 28th Conference of Korean

Society of Tribologists and Lubrication Engineers, December, 1998,

pp.49-58.

9. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental Study on

the Rolling Resistance of Bearings Coated by Pure Silver", Proceedings

of the 12th International Conference on Wear of Materials, Atlanta,

USA, 1999, pp.119-126.

10. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "An Experimental Study on

the Frictional Behavior of Silver Coating Films at Sliding Surfaces",

Proceedings of the 29th Conference of Korean Society of Tribologists

and Lubrication Engineers, June, 1999, pp.7-13.

11. S.H. Yang, H. Kong, K.R. Lee, S. Park, "Effect of Environmental

Changes on the Tribological Behavior of Si-incorporated DLC films",

Proceedings of the 13th Conference on Mechanical Behaviors of

Materials, Seoul, Korea, 1999.

12. S.H. Yang, H. Kong, K.R. Lee, S. Park and D.E. Kim, "Effect of

Environment on the Tribological Behavior of Si-incroporated Diamond-

like Carbon Films (written in Korean)", Proceedings of the 30th

Conference of Korean Society of Tribologists and Lubrication

Engineers, December, 1999, pp.42-48.

13. E.-S. Yoon, J.H. Park, S.H. Yang and H. Kong, "Effect of Contact

Conditions on the Micro-adhesion Characteristics using SPM",

Proceedings of the 32nd Conference of Korean Society of Tribologists

and Lubrication Engineers, December, 2000, pp.18-22.

14. S.H. Yang, H. Kong, E-S. Yoon and D.E. Kim, "An Experimental Study on

the Effect of Wear Particles on the Sliding Behavior of Silver-coated

Bearing Steels", Proceedings of the 32nd Conference of Korean Society

of Tribologists and Lubrication Engineers, December, 2000, pp.59-66.

15. E.-S. Yoon, J.H. Park, S.H. Yang, H.-G. Han and H. Kong, "An

Experimental Study on the Micro-adhesion of Octadecyltrichlorosilane

SAM on the Si Surface", Proceedings of the 32nd Conference of Korean

Society of Tribologists and Lubrication Engineers, December, 2000,

pp341-346.

16. E.-S. Yoon, J.H. Park, S.H. Yang, H.-G. Han and H. Kong, "An

Experimental Study on the Micro-adhesion of Octadecyltrichlorosilane

SAM on Si Surface", Proceedings on the 1st Intelligent Microsystem

Symposium, Seoul, Korea, 2001, April, pp.97.

17. E.-S. Yoon, S.H. Yang, H. Kong, D.-Y. Chung, "Effect of Contact

Conditions on the Micro Adhesion Characteristics Using SPM", 13th

International Conference on Wear of Materials, Vancouver, Canada,

April, 2001

18. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "Effect of Silver

Particle Introduction on Rolling Friction", Proceedings of the 33rd

Conference of Korean Society of Tribologists and Lubrication

Engineers, June, 2001, pp105-113.

19. E.-S. Yoon, J.H. Park, S.H. Yang, H. Kong and K.Y. Jhang,

"Nanotribological Characteristics of Silicon Surfaces Modified by

IBAD", Proceedings of the 33rd Conference of Korean Society of

Tribologists and Lubrication Engineers, June, 2001, pp127-134.

20. E.-S. Yoon, J.H. Park, S.H. Yang, H.-G. Han and H. Kong, "An

experimental study on the adhesion phenomena between nano-surfaces",

3rd International Colloquium, Micro-Tribology 2001, Poland, August 28-

30.

21. S.H. Yang, E.-S. Yoon and H. Kong, "An Experimental Study on the

Nanotribological Characteristics of Silver Surfaces Coated by IBAD",

3rd International Colloquium, Micro-Tribology 2001, Poland, August 28-

30.

22. S.H. Yang, H. Kong, E.-S. Yoon, "An Experimental Study on the Effect

of Wear Particles on the Sliding Behavior of Silver-Coated Bearing

Steel", 2nd World Tribology Congress, September, 2001.

23. S.H. Yang, E.-S. Yoon and H. Kong, "A Study on the Tribological

Characteristics of Thermally Evaporated Silver Films Assisted by

Atomic Mixing", Proceedings of the 34th Conference of Korean Society

of Tribologists and Lubrication Engineers, December, 2001, pp27-34.

24. E.-S. Yoon, J.H. Park, S.H. Yang, H.-G. Han, H. Kong and S.-K. Koh,

"Nanotribological Characteristics of Plasma Treated Hydrophobic Thin

Films on Silicon Surfaces Using SPM", Proceedings of the 34th

Conference of Korean Society of Tribologists and Lubrication

Engineers, December, 2001, pp35-42.

25. H.-G. Han, H. Kong, E.-S. Yoon and S.H. Yang, "An Experimental Study

on the Micro Friction and Wear Characteristics of Organically Modified

Hybrid Ceramic Materials by A Sol-Gel Process", Proceedings of the

35th Conference of Korean Society of Tribologists and Lubrication

Engineers, 2002, pp.215-225.

26. E.-S. Yoon, S.H. Yang and H. Kong, "Nano adhesion and Friction of

[pic]and [pic]SAM coatings", Proceedings of the 35th Conference of

Korean Society of Tribologists and Lubrication Engineers, 2002, pp.207-

214.

27. E.-S. Yoon, H.J. Oh, S.H. Yang and H. Kong, "Effect of surface

topography on wetting angle and micro/nano-tribological

characteristics", Proceedings of the 35th Conference of Korean Society

of Tribologists and Lubrication Engineers, 2002, pp.25-33.

28. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "A Study on the Formation

and the Tribological Role of Mass Transfers Layers at Rubbing Silver-

coated Surface", Proceedings of the 35th Conference of Korean Society

of Tribologists and Lubrication Engineers, 2002, pp.45-52.

29. S.H. Yang, E.-S. Yoon, H. Kong, K.-H. Kim, "An Experimental Study on

the Micro/Nano Adhesion and Friction of Plasma-Treated Hydrophobic

Thin Films", 2nd International Workshop on Microtribology, April,

Ishigaki Island, Japan, 2002.

30. S.H. Yang, E.-S. Yoon, H. Kong, S.-K. Koh, "Micro/nano tribological

characteristics of ultrahydrophobic PTFE surface modified by ion beam

treatment", 2nd International Workshop on Microtribology, April,

Ishigaki Island, Japan, 2002.

31. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "The role of mass

transfer layer on the tribological characteristics of silver-coated

surfaces", The International Conference On Metallurgical Coatings And

Thin Films, ICMCTF 2002, April, San Diego, California, USA.

32. E.-S. Yoon, S.H. Yang, H.-G. Han and H. Kong, "Nano adhesion,

friction and wear of hydrophobic surfaces using SPM", The

International Conference On Metallurgical Coatings And Thin Films,

ICMCTF 2002, April, San Diego, California, USA.

33. S.H. Yang, H. Kong, E.-S. Yoon and D.E. Kim, "A wear map of bearing

steel lubricated by silver films", Wear of Materials, Washington D.C.,

USA, 2003

34. E.-S. Yoon, S.H. Yang, H.-G. Han, H.-J. Oh and H. Kong, "Micro/Nano

tribological characteristics of thin fluorocarbon based hydrophobic

polymeric coatings deposited by IBAD method", Wear of Materials,

Washington D.C., USA, 2003.

35. S.H. Yang and S.M. Hsu, "Effect of colloidal probe roughness on

adhesion" World Tribology Congress III, Washington D.C., USA,

September, 2005

36. S.H. Yang and S.M. Hsu, "Nanoscale surface force apparatus", World

Tribology Gongress III, Washington D.C., USA, September, 2005.

37. S.H. Yang and S.M. Hsu, "Effect of capillary bridge on nanoscale

adhesion", World Tribology Congress III, Washington D.C., USA,

September, 2005

38. H. Zhang, S.H. Yang and S.M. Hsu, "Influence of colloidal probe random

surface features on adhesion", 61st Society of Tribologists and

Lubrication Engineers (STLE) Annual Meeting and Exhibition, Calgary,

Canada, May 7-11, 2006.

39. S.H. Yang, H. Zhang and S.M. Hsu, "Contact area correction for surface

roughness on nanoadhesion", Gordon Research Conference, Colby College,

Waterville, Maine, USA, June, 18-23, 2006.

40. S. Avramov-Zamurovic,.; N.G. Dagalakis,.; R.D. Lee; Y.S. Kim; J. M.

Yoo and S.H. Yang, "Embedded Capacitive Displacement Sensor for

Nanopositioning Applications", 2010 Conference on Precision

Electromagnetic Measurements (CPEM 2010)

Daejeon, South Korea, 13-18 June, 316-***-****.

V. References

( Dr. Brian R. Lawn

Member, National Academy of Engineering (NAE)

NIST Fellow(retired), Ceramics Division,

Materials Science and Engineering Laboratory,

National Institute of Standards and Technology (NIST), USA

E-mail: *****@****.***

Tel: 301-***-****

( Dr. Nicholas G. Dagalakis (Supervisor at NIST)

Project Leader, Intelligent Systems Division,

Engineering Laboratory,

National Institute of Standards and Technology (NIST), USA

E-mail: ********.*********@****.***

Tel: 301-***-****

( Dr. Richard S. Gates

Leader, Nanomechanical Properties Group,

Materials Science and Engineering Laboratory,

National Institute of Standards and Technology (NIST), USA

E-mail: *******.*****@****.***

Tel: 301-***-****

( Dr. Robert. Cook (Ex-Supervisor at NIST)

NIST Fellow, Ceramics Division,

Materials Science and Engineering Laboratory,

National Institute of Standards and Technology (NIST), USA

E-mail: ******.****@****.***

Tel: 301-***-****

( Professor Stephen M. Hsu (Ex-Supervisor at NIST)

Department of Mechanical & Aerospace Engineering,

George Washington University, USA

E-mail: ********@***.***

Tel: 703-***-****

Contact this candidate