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Helen L. W. Chan
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Journal Articles

Ferroelectric domain structures in <001>-oriented K0.15Na0.85NbO3 lead-free single crystal

Yan Chen, Chi-Man Wong, Hao Deng, Hei-Man Yau, Danyang Wang, Zhibo Yan, Haosu Luo, Helen L. W. Chan, Jiyan Dai
Journal: AIP Advances
AIP Advances 5, 037117 (2015)
https://doi.org/10.1063/1.4914936
Published: March 2015
View article titled, Ferroelectric domain structures in &lt;001&gt;-oriented K<sub>0.15</sub>Na<sub>0.85</sub>NbO<sub>3</sub> lead-free single crystal
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Journal Articles

Erratum: “Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics” [Appl. Phys. Lett. 105 , 042904 (2014)]

Shengbo Lu, Zhengkui Xu, K. W. Kwok, Helen L. W. Chan
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 119901 (2014)
https://doi.org/10.1063/1.4894639
Published: September 2014
View article titled, Erratum: “Hot-stage transmission electron microscopy study of (Na, K)NbO<sub>3</sub> based lead-free piezoceramics” [Appl. Phys. Lett. 105 , 042904 (2014)]
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Journal Articles

Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics

Shengbo Lu, Zhengkui Xu, K. W. Kwok, Helen L. W. Chan
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 042904 (2014)
https://doi.org/10.1063/1.4891960
Published: July 2014
View article titled, Hot-stage transmission electron microscopy study of (Na, K)NbO<sub>3</sub> based lead-free piezoceramics
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Journal Articles

The influence of gate dielectrics on a high-mobility n-type conjugated polymer in organic thin-film transistors

Jinhua Li, Jun Du, Jianbin Xu, Helen L. W. Chan, Feng Yan
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 033301 (2012)
https://doi.org/10.1063/1.3678196
Published: January 2012
View article titled, The influence of gate dielectrics on a high-mobility n-type conjugated polymer in organic thin-film transistors
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Journal Articles

Release monitoring of single cells on a microfluidic device coupled with fluorescence microscopy and electrochemistry

Bao-Xian Shi, Yu Wang, Tin-Lun Lam, Wei-Hua Huang, Kai Zhang, Yun-Chung Leung, Helen L. W. Chan
Journal: Biomicrofluidics
Biomicrofluidics 4, 043009 (2010)
https://doi.org/10.1063/1.3491470
Published: December 2010
View article titled, Release monitoring of single cells on a microfluidic device coupled with fluorescence microscopy and electrochemistry
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Journal Articles

Optofluidic planar reactors for photocatalytic water treatment using solar energy

Lei Lei, Ning Wang, X. M. Zhang, Qidong Tai, Din Ping Tsai, Helen L. W. Chan
Journal: Biomicrofluidics
Biomicrofluidics 4, 043004 (2010)
https://doi.org/10.1063/1.3491471
Published: December 2010
View article titled, Optofluidic planar reactors for photocatalytic water treatment using solar energy
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Journal Articles

Theoretical prediction on the structural, electronic, and polarization properties of tetragonal Bi 2 ZnTiO 6

Hai Wang, Haitao Huang, Wei Lu, Helen L. W. Chan, Biao Wang, C. H. Woo
Journal: Journal of Applied Physics
J. Appl. Phys. 105, 053713 (2009)
https://doi.org/10.1063/1.3086628
Published: March 2009
View article titled, Theoretical prediction on the structural, electronic, and polarization properties of tetragonal Bi 2 ZnTiO 6
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Journal Articles

Dielectric dispersion behavior of Ba ( Zr x Ti 1 − x ) O 3 solid solutions with a quasiferroelectric state

Shanming Ke, Huiqing Fan, Haitao Huang, Helen L. W. Chan, Shuhui Yu
Journal: Journal of Applied Physics
J. Appl. Phys. 104, 034108 (2008)
https://doi.org/10.1063/1.2964088
Published: August 2008
View article titled, Dielectric dispersion behavior of Ba ( Zr x Ti 1 − x ) O 3 solid solutions with a quasiferroelectric state
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Journal Articles

Organic phototransistor based on poly(3-hexylthiophene)/ Ti O 2 nanoparticle composite

Sheung Man Mok, Feng Yan, Helen L. W. Chan
Journal: Applied Physics Letters
Appl. Phys. Lett. 93, 023310 (2008)
https://doi.org/10.1063/1.2957981
Published: July 2008
View article titled, Organic phototransistor based on poly(3-hexylthiophene)/ Ti O 2 nanoparticle composite
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Journal Articles

Measurement of ultralow injection current to polymethyl-methacrylate film

Feng Yan, Yi Hong, Helen L. W. Chan
Journal: Applied Physics Letters
Appl. Phys. Lett. 92, 243301 (2008)
https://doi.org/10.1063/1.2948853
Published: June 2008
View article titled, Measurement of ultralow injection current to polymethyl-methacrylate film
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Journal Articles

Lead magnesium niobate‐lead titanate single crystal thick films on silicon substrate for high‐frequency micromachined ultrasonic transducers

Jue Peng, Chen Chao, Jiyan Dai, Helen L. W. Chan, Haosu Luo
Journal: The Journal of the Acoustical Society of America
J. Acoust. Soc. Am. 123, 3784 (2008)
https://doi.org/10.1121/1.2935437
Published: May 2008
View article titled, Lead magnesium niobate‐lead titanate single crystal thick films on silicon substrate for high‐frequency micromachined ultrasonic transducers
Journal Articles

Thermal shifting of phononic bandgaps in barium strontium titanate‐based structures

Kwok Lung Jim, Chi Wah Leung, Chung Loong Choy, Helen L. W. Chan
Journal: The Journal of the Acoustical Society of America
J. Acoust. Soc. Am. 123, 3281 (2008)
https://doi.org/10.1121/1.2933641
Published: May 2008
View article titled, Thermal shifting of phononic bandgaps in barium strontium titanate‐based structures
Journal Articles

A study on the disk-shaped piezoelectric transformer with multiple outputs

Mingsen Guo, K. H. Lam, S. Wang, K. W. Kwok, Helen L. W. Chan, X. Z. Zhao
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 78, 125103 (2007)
https://doi.org/10.1063/1.2818809
Published: December 2007
View article titled, A study on the disk-shaped piezoelectric transformer with multiple outputs
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Journal Articles

A lead-free piezoelectric transformer in radial vibration modes

Mingsen Guo, D. M. Lin, K. H. Lam, S. Wang, Helen L. W. Chan, X. Z. Zhao
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 78, 035102 (2007)
https://doi.org/10.1063/1.2712795
Published: March 2007
View article titled, A lead-free piezoelectric transformer in radial vibration modes
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Journal Articles

Lead-free multilayer piezoelectric transformer

Mingsen Guo, X. P. Jiang, K. H. Lam, S. Wang, C. L. Sun, Helen L. W. Chan, X. Z. Zhao
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 78, 016105 (2007)
https://doi.org/10.1063/1.2432245
Published: January 2007
View article titled, Lead-free multilayer piezoelectric transformer
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Journal Articles

Dielectric and tunable properties of K-doped Ba 0.6 Sr 0.4 Ti O 3 thin films fabricated by sol-gel method

Xiaohua Sun, Bailin Zhu, Tao Liu, Meiya Li, Xing-Zhong Zhao, Danyang Wang, Chengliang Sun, Helen L. W. Chan
Journal: Journal of Applied Physics
J. Appl. Phys. 99, 084103 (2006)
https://doi.org/10.1063/1.2189976
Published: April 2006
View article titled, Dielectric and tunable properties of K-doped Ba 0.6 Sr 0.4 Ti O 3 thin films fabricated by sol-gel method
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Journal Articles

dc bias-induced dielectric anomalies in ⟨111⟩-oriented 0.9 Pb ( Mg 1 ∕ 3 Nb 2 ∕ 3 O 3 ) – 0.1 Pb Ti O 3 single crystals

Jie Wang, Y. M. Jia, R. K. Zheng, Helen L. W. Chan, X. Zhao, H. Luo
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 112909 (2006)
https://doi.org/10.1063/1.2186102
Published: March 2006
View article titled, dc bias-induced dielectric anomalies in ⟨111⟩-oriented 0.9 Pb ( Mg 1 ∕ 3 Nb 2 ∕ 3 O 3 ) – 0.1 Pb Ti O 3 single crystals
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Journal Articles

High electrostriction and relaxor ferroelectric behavior in proton-irradiated poly(vinylidene fluoride-trifluoroethylene) copolymer

Shishang Guo, Xing-Zhong Zhao, Qifa Zhou, Helen L. W. Chan, C. L. Choy
Journal: Applied Physics Letters
Appl. Phys. Lett. 84, 3349–3351 (2004)
https://doi.org/10.1063/1.1715151
Published: April 2004
View article titled, High electrostriction and relaxor ferroelectric behavior in proton-irradiated poly(vinylidene fluoride-trifluoroethylene) copolymer
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Journal Articles

Ferroelectric properties of ( Ba 0.5 Sr 0.5 ) TiO 3 / Pb ( Zr 0.52 Ti 0.48 ) O 3 /   ( Ba 0.5 Sr 0.5 ) TiO 3 thin films with platinum electrodes

Feng Yan, Yening Wang, Helen L. W. Chan, Chung Loong Choy
Journal: Applied Physics Letters
Appl. Phys. Lett. 82, 4325–4327 (2003)
https://doi.org/10.1063/1.1583137
Published: June 2003
View article titled, Ferroelectric properties of ( Ba 0.5 Sr 0.5 ) TiO 3 / Pb ( Zr 0.52 Ti 0.48 ) O 3 /   ( Ba 0.5 Sr 0.5 ) TiO 3 thin films with platinum electrodes
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Journal Articles

Cooling-rate-dependent dielectric properties of ( Pb ( Mg 1/3 Nb 2/3 ) O 3 ) 0.67 ( PbTiO 3 ) 0.33 single crystals in ferroelectric phase

Feng Yan, Peng Bao, Yening Wang, Helen L. W. Chan, Chung Loong Choy
Journal: Applied Physics Letters
Appl. Phys. Lett. 81, 4580–4582 (2002)
https://doi.org/10.1063/1.1527701
Published: December 2002
View article titled, Cooling-rate-dependent dielectric properties of ( Pb ( Mg 1/3 Nb 2/3 ) O 3 ) 0.67 ( PbTiO 3 ) 0.33 single crystals in ferroelectric phase
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