Personal Details

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Dr. YAO Kui (Adjunct @ NTU, Materials Science and Engineering)

Principal Scientist II/ Programme Mgr ST/Research Councillor, Electronic Materials


IMRE staff with Adjunct Appointment in University/Industry, Electronic Materials (ELE) Department


2 Fusionopolis Way. Innovis, #08-03, Singapore 138634.

Research Details

  • Smart Materials 
    • Materials with sensing, actuation, signal and energy transduction functions, including ferroelectric, piezoelectric, photovoltaic, and biochemical sensing materials. 
  • Sensors, actuators and transducers 
      • Design, fabrication, and characterization of sensors, actuators, and transducers based on the functional mechanisms of smart materials and their applications.
    • Dielectric, ferroic and piezoelectric materials and devices.
    • Sensors, actuators, acoustic and energy transducers.

    Smart materials for structural, sensors and transducers and environmental monitoring
    Mechanical energy absorbing materials for vibration & noise mitigation
    Material-critical sensing, actuation, and energy/signal transduction
    Low power, batteryless and wireless sensing
    Direct-write sensor technology
    Advanced piezoelectric materials, acoustic and photoacoustic transducers
    • 2013 -                    Principal Scientist, Institute of Materials Research & Engineering (IMRE), Singapore                                            (promoted to Principal Scientist II in 2018
    • 2005 -                    Adjunct Professor, Materials Science and Engineering, Nanyang Technological University,                                    Singapore
    • 2003 - 2012:          Senior Scientist, Institute of Materials Research & Engineering (IMRE), Singapore
    • 2002:                     Senior Research Fellow, Institute of Materials Research & Engineering (IMRE), Singapore
    • 1997 - 2001:          Research Fellow, Institute of Materials Research & Engineering (IMRE), Singapore
    • 1998 - 1999:          Materials Research Laboratory, The Pennsylvania State University, USA
    • 1997:                     Nanyang Technological University, Singapore
    • 1995 - 1997:          Post Doctoral Fellow, Microelectronics Center, Nanyang Technological University, Singapore

    • PhD, Xi'an Jiaotong University, China, 1995
    • ME, Xidian University, China, 1992
    • BSc, Xi'an Jiaotong University, China, 1989
    IES Prestigious Engineering Achievement Awards 2018
    • Adjunct Professor, Materials Science and Engineering, NTU
    • Member, IEEE Ferroelectrics Standing Committee
    • Board Member, Journal of Advanced Dielectrics
    • S Chen, CKI Tan, SY Tan, S Guo, L Zhang, and K Yao, “Potassium sodium niobate (KNN)-based lead-free piezoelectric ceramic coatings on steel structure by thermal spray method,” J. Am. Ceram. Soc. 101, 5524–5533, 2018.
    • YM Abdelrahman, K Yao, S Chen, WH Liew, and S Ramakrishna, "Mechanisms for enhancing polarization orientation and piezoelectric parameters of PVDF nanofibers", Adv. Electron. Mater. 4, 1700562, 2018.
    • WH Liew, K Yao, S Chen, and FEH Tay, “Piezoelectric nanotube array for broadband high frequency ultrasonic transducer,” IEEE Trans. Ultrason. Ferroelectr. Freq. Contr. 65, 457-464, 2018.
    • S Guo, S Chen, L Zhang, YF Chen, and K Yao, “Plastic strain determination with nonlinear ultrasonic waves using in-situ integrated piezoelectric ultrasonic transducers,” IEEE Trans. Ultrason. Ferroelectr. Freq. Contr. 65, 95-101, 2018.
    • M Rahimabady, EC Statharas, K Yao, M Sharifzadeh Mirshekarloo, S Chen, and FEH Tay, “Hybrid local piezoelectric and conductive functions for high performance airborne sound absorption,” Appl. Phys. Letts. 111, 241601, 2017.
    • K Guo, S Chen, CKI Tan, M Sharifzadeh Mirshekarloo, K Yao, and FEH Tay, “Bismuth sodium titanate lead-free piezoelectric coatings by thermal spray process,” J. Am. Ceram. Soc. 100, 3385–3392, 2017.
    • Y Wang, K Yao, X Qin, M Sharifzadeh Mirshekarloo, X Liu, and FEH Tay, “High Piezoelectric Performance and Phase Transition in Stressed Lead-free (1-x)(K, Na)(Sb, Nb)O3-x(Bi, Na, K)ZrO3 Thin Films,” Adv. Electron. Mater. 3, 1700033 and cover page, 2017.
    • M Rahimabady, CY Tan, SY Tan, S Chen, L Zhang, YF Chen, K Yao, K Zang, A Humbert, D Soccol, and M Bolt, “Dielectric nanocomposite of diphenylethylenediamine and P-type multi-walled carbon nanotube for capacitive carbon dioxide sensors,” Sens. Actuat. B. 243, 596–601, 2017.
    • S Chen, CKI Tan, and K Yao, “Potassium-sodium niobate based lead-free piezoelectric ceramic coatings by thermal spray process,” J. Am. Ceram. Soc. 99, 3293–3299, 2016.
    • Y Wang, K Yao, M Sharifzadeh Mirshekarloo, FEH Tay, “Effects and mechanism of combinational chemical agents on solution-derived K0.5Na0.5NbO3 piezoelectric thin films,” J. Am. Ceram. Soc. 99, 1631–1636, 2016.
    • Z Shen, CY Tan, K Yao, L Zhang, and YF Chen, “A miniaturized wireless accelerometer with micromachined piezoelectric sensing element,” Sens. Actuat. A241, 113–119, 2016.
    • WH Liew, M Sharifzadeh Mirshekarloo, S Chen, K Yao, and FEH Tay, “Nanoconfinement induced crystal orientation and large piezoelectric coefficient in vertically aligned P(VDF-TrFE) nanotube array,” Sci. Rep. 5, 9790, 2015.
    • Z Fan, J Xiao, K Yao, K Zeng, J Wang, “Ferroelectric polarization relaxation in Au/Cu2O/ZnO/BiFeO3/Pt heterostructure,” Appl. Phys. Letts. 106, 102902, 2015.
    • Z Fan, W Ji, T Li, J Xiao, P Yang, KP Ong, K Zeng, K Yao, and J Wang, “Enhanced photovoltaic effects and switchable conduction behavior in BiFe0.6Sc0.4O3 thin films,” Acta Mater. 88, 83–90, 2015.
    • Y Jiang, CY Tan, S Y Tan, MSF Wong, YF Chen, L Zhang, and K Yao, SKE Gan, C Verma, and YJ Tan, “SAW sensor for Influenza A virus detection enabled with efficient surface functionalization,” Sens. Actuat. B209, 78–84, 2015.
    • Z Fan, K Yao, J Wang, “Photovoltaic effect in an ITO/ZnO/BiFeO3/Pt heterostructure,” Appl. Phys. Letts. 105, 162903, 2014.
    • W Ji, CKI Tan, K Yao, AA Mamun, CS Bhatia, and TI Wong, “Structural evolution and properties of 0.3Pb(In1/2Nb1/2)O3-0.38Pb(Mg1/3Nb2/3)O3-0.32PbTiO3 ferroelectric ceramics with different sintering times,” J. Am. Ceram. Soc. 97(10), 3294-3300, 2014.
    • M Rahimabady, LQ Xu, S Arabnejad, K Yao, L Lu, VPW Shim, KG Neoh, ET Kang, “Poly(vinylidene fluoride-co-hexafluoropropylene)-graft-poly(dopamine methacrylamide) copolymers: a nonlinear dielectric material for high energy density storage,” Appl. Phys. Letts. 103(26), 262904, 2013.
    • L Zhang, SR Oh, TC Wong, CY Tan, and K Yao, “Piezoelectric polymer multilayer on flexible substrate for energy harvesting,” IEEE Trans. Ultrason. Ferroelectr. Freq. Contr. 60(9), 2013-2020, 2013.
    • .SC Lai, K Yao, and YF Chen, “A battery-less photo-detector enabled with simultaneous ferroelectric sensing and energy harnessing mechanism,” Appl. Phys. Letts. 103(9), 092903, 2013.
    • W Ji, K Yao, YF Lim, YC Liang, and A Suwardi, “Epitaxial ferroelectric BiFeO3 thin films for unassisted photocatalytic water splitting,” Appl. Phys. Letts. 103, 062901, 2013.
    • H. Liu, P Yang, Z Fan, A Kumar, K Yao, PK Ong, K Zeng, and J Wang, “Uniaxial strain-induced ferroelectric phase with a giant axial ratio in a (110) BiFeO3 thin film,” Phys. Rev. B 87(2287), 220101, 2013.
    • X Li, YF Lim, K Yao, FEH Tay and KH Seah, “Ferroelectric PVDF homopolymer nanotubes derived from solution in anodic alumina membrane template,” Chem. Mater. 25(4), 524-529, 2013.
    • Meysam Sharifzadeh Mirshekarloo, L Zhang, K Yao, and T Sritharan, “Electromechanical properties and fatigue of antiferroelectric (Pb,La)(Zr,Sn,Ti)O3 thin film cantilevers fabricated by micromachining,” Sens. Actuat. A 187, 127-131, 2012.
    • PC Goh, K Yao, and Z Chen, "Reaction mechanisms of ethylenediaminetetraacetic acid and diethanolamine in the precursor solution for producing (K,Na)NbO3 Thin Films with outstanding piezoelectric properties", J. Phys. Chem. C 116(29), 15550–15556, 2012.
    • M Rahimabady, K Yao, S Arabnejad, L Lu, VPW Shim, and DCW Chet, “Intermolecular interactions and high dielectric energy storage density in poly(vinylidene fluoride-hexafluoropropylene)/poly(vinylidene fluoride) blend thin films,” Appl. Phys. Letts. 100, 252907, 2012.
    • M Sharifzadeh Mirshekarloo, K Yao, and T Sritharan, “Ferroelastic strain induced antiferroelectric-ferroelectric phase transformation in multilayer thin film structures,” Adv. Funct. Mater. 22, 4159–4164, 2012.
    • GX Ni, Y Zheng, S Bae, CY Tan, O Kahya, J Wu, BH Hong, K Yao, and B Ozyilmaz, “Graphene-ferroelectric hybrid structure for flexible transparent electrodes,” ACS Nano 6(5), 3935–3942, 2012.
    • G Kang, K Yao, and J Wang, “(1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ferroelectric thin films prepared from chemical solutions,” J. Am. Ceram. Soc. 95(3), 986–991, 2012.
    • H Liu, P Yang, K Yao, PK Ong, P Wu and J Wang, “Origin of tetragonal BiFeO3 phase with giant c/a ratio on SrTiO3 substrates,” Adv. Funct. Mater. 22, 937–942, 2012.
    • S Shanmugavel, K Yao, TD Luong, SR Oh, Y Chen, CY Tan, A Gaunekar, PHY Ng, and MHL Li, “Miniaturized acceleration sensors with in-plane polarized piezoelectric thin films produced by micromachining,” IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 58 (11), 2289-2296 and front cover page, 2011.
    • M Rahimabady, S Chen, K Yao, FEH Tay, and L Lu, “High electric breakdown strength and energy density in vinylidene fluoride oligomer/poly(vinylidene fluoride) blend thin films,” Appl. Phys. Letts. 99 (14), 142901, 2011.
    • W Ji, K Yao, and YC Liang, “Evidence of bulk photovoltaic effect and large tensor coefficient in ferroelectric BiFeO3 thin films”, Phys. Rev. B 84, 094115, 2011.
    • K Yao, S Chen, M Rahimabady, M Sharifzadeh Mirshekarloo, S Yu, FEH Tay, T Sritharan, and L Lu, “Nonlinear dielectric thin films for high power electric storage with energy density comparable with electrochemical supercapacitors,” IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 58(9), 1968-1974, 2011.
    • PC Goh, K Yao, and Z Chen, “Lithium diffusion in (Li, K, Na)NbO3 piezoelectric thin films and the resulting approach for enhanced performance properties,” Appl. Phys. Lett. 99(9), 092902, 2011.
    • BK Gan, K Yao, SC Lai, PC Goh, and YF Chen, “A ferroelectric ultraviolet (UV) detector with constructive photovoltaic outputs,” IEEE Electron Dev. Letts. 32(5), 665-667, 2011.
    • CKI Tan, K Yao, and J Ma, “Effects of ultrasonic irradiation on the structural and electrical properties of lead-free KNN-LN Ceramics,” J. Am. Ceram. Soc. 94(3), 776–781, 2011.
    • L You, C Lu, P Yang, G Han, T Wu, U Luders, W Prellier, K YAO, L Chen, and J Wang, “Uniaxial magnetic anisotropy in La0.7Sr0.3MnO3 thin films induced by multiferroic BiFeO3 with striped ferroelectric domains,” Adv. Mater. 22 (44), 4964–4968, 2010.
    • Y Zheng, GX Ni, CT Toh, CY Tan, K Yao, and B Ozyilmaz, “Graphene field effect transistors with ferroelectric gating,” Phys. Rev. Letts. 105 (16), 166602, 2010.
    • MS Mirshekarloo, K YAO, and T Sritharan, “Large strain and high energy storage density in orthorhombic perovskite PLZST antiferroelectric thin films,” Appl. Phys. Letts. 97(14), 142902, 2010.
    • PC Goh, K YAO, and Z Chen, “Lead-free piezoelectric (K0.5Na0.5)NbO3 thin films derived from chemical solution modified with stabilizing agents,” Appl. Phys. Letts. 97(10), 102901, 2010.
    • H LIU, P YANG, K YAO, and J WANG "Twinning rotation and ferroelectric behavior of epitaxial BiFeO3 (001) thin film", Appl. Phys. Letts. 96, 012901, 2010.
    • W JI, K YAO, and YC LIANG, “Bulk photovoltaic effect at visible wavelength in epitaxial ferroelectric BiFeO3 thin films,” Adv. Mater. 22 (15), 1763–1766, 2010.
    • M QIN, K YAO, and Y C LIANG, “Photovoltaic mechanisms in ferroelectric thin films with the effects of the electrodes and interfaces,” Appl. Phys. Letts. 95, 022912, 2009.
    • Y Zheng, GX Ni, CT Toh, MG Zeng, S Chen, K YAO, and B Özyilmaz, “Gate-controlled nonvolatile graphene-ferroelectric memory,”Appl. Phys. Letts. 94, 163505, 2009.
    • BK GAN, K YAO, SC LAI, YF CHEN and PC GOH, "An ultraviolet (UV) detector using a ferroelectric thin film with in-plane polarization," IEEE Electron Device Letts. 29(11), 1215-1217, 2008.
    • M QIN, K YAO, YC LIANG, "High efficient photovoltaics in nano-scaled ferroelectric thin films", Appl. Phys. Letts. 93, 122904, 2008.
    • L WANG, K YAO, and W REN, "Piezoelectric K0.5Na0.5NbO3 thick films derived from polyvinylpyrrolidone modified chemical solution deposition," Appl. Phys. Letts. 93, 092903, 2008.
    • Xujiang He and Kui YAO, "Crystallization mechanism and piezoelectric properties of solution-derived ferroelectric poly(vinylidene fluoride) thin films," Appl. Phys. Letts. 89, 112909, 2006.
    • K YAO, S YU, and FEH TAY, "Preparation of perovskite Pb(Zn13Nb2/3)O3-based thin films from polymer-modified solution precursors," Appl. Phys. Letts. 88, 052904, 2006.
    • K YAO, BK GAN, M CHEN, and S SHANNIGRAHI, "Large photo-induced voltage in a ferroelectric thin film with in-plane polarization," Appl. Phys. Letts. 87, 212906, 2005.
    • S YU, K YAO, and FEH TAY, "Preparation, structure and properties of 0.3Pb(Zn1/3Nb2/3)O3-0.7PbTiO3 thin films on LaNiO3/YSZ/Si Substrates," Chem. Mater. 16(2), 346-350, 2004.
    • K Yao, S YU, and FEH TAY, "Residual stress analysis in ferroelectric Pb(Zr0.52Ti0.48)O3 thin films fabricated by a sol-gel process," Appl. Phys. Lett. 82, 4540-4542, 2003.
    • K Yao and FEH TAY, ''Measurement of longitudinal piezoelectric coefficient of thin films by a laser scanning vibrometer,'' IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 50, 113-116 and front cover page, 2003.
    • K YAO, B KOC, and K UCHINO, ''Longitudinal-bending mode micro motor using multilayer piezoelectric actuator,'' IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 48, 1066-1071, 2001.
    • K YAO, W ZHU, K UCHINO, Z ZHANG, and LC LIM, ''Design and fabrication of a high performance multilayer piezoelectric actuator with bending deformation,'' IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 46, 1020-1027, 1999.

    • A method to produce electromechanical polymer multilayer structures and the resulting devices
    • A window with active and passive noise mitigation means
    • A method for monitoring pipeline structures with piezoelectric acoustic transducers
    • Multilayer structure with lead-free piezoelectric ceramic coating on metal substrate
    • Sound-absorbing porous composite
    • High frequency ultrasonic transducer using one-dimensional piezoelectric nanostructures
    • A method of monitoring plastic deformation of a structural material
    • Noise mitigation window with multi-cell transparent electro-active film speaker
    • Carbon dioxide sensitive dielectric materials
    • Fluid jet dispenser using multilayer ceramic actuators
    • Photodarkening ultraviolet protective shield and the method of processing the films of the same
    • A battery-less accelerometer
    • Direct-write acoustic transducers and method for structural health monitoring
    • Method of forming lead-free piezoelectric ceramic coatings
    • A wireless piezoelectric accelerometer for vibration monitoring
    • A surface acoustic wave sensor for influenza detection
    • Lead free electro-optic ceramics
    • A photo-sensor with a transparent substrate
    • Battery-less photo-detector
    • A piezoelectric actuator and apparatus for head positioning in high density hard disk drives
    • Method for producing a piezoelectric polymer multilayer material
    • A self-powered remote control device
    • Lead free piezoelectric thin films derived from chemical solution
    • UV detectors with constructive photovoltaic effects
    • A Method of forming a oligomer or co-oligomer film on a substrate and an electrical device comprising the oligomer or co-oligomer film on the substrate
    • Piezoelectric sensors and methods for fabricating piezoelectric sensors
    • Miniaturized piezoelectric accelerometers
    • Ferroelectric poly(vinylidene fluoride) film on a substrate and method for its formation
    • User-powered wireless remote control system
    • Ultraviolet (UV) detectors
    • Power supply device and system
    • Ferroelectric ceramics with low sintering temperature
    • Thin film photovoltaic devices
    • Thin films of ferroelectric materials and a method for preparing same
    • Micro-electromechanical devices
    • Micromachined electromechanical device
    • Liquid delivering device
    • Method to produce a reliable piezoelectric thick film on a substrate
    • Multilayer piezoelectric actuator with bending deformation and methods for its manufacture
    • Laminated multilayer thick-film actuator
    • Chemical preparation method of ferroelectric glass-ceramic powders

    Last updated on : 19 Nov 2018 12:17 PM