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Featured researches published by Duc Minh Nguyen.
Science and Technology of Advanced Materials | 2013
Evert Pieter Houwman; Duc Minh Nguyen; Jan M. Dekkers; Augustinus J.H.M. Rijnders
Abstract Piezoelectric thin films of PbZr0.45Ti0.55O3 were grown on Si substrates in four different ways, resulting in different crystalline structures, as determined by x-ray analysis. The crystalline structures were different in the spread in tilt angle and the in-plane alignment of the crystal planes between different grains. It is found that the deviations of the ferroelectric polarization loop from that of the ideal rectangular loop (reduction of the remanent polarization with respect to the saturation polarization, dielectric constant of the film, slanting of the loop, coercive field value) all scale with the average tilt angle. A model is derived based on the assumption that the tilted grain boundaries between grains affect the film properties locally. This model describes the observed trends. The effective piezoelectric coefficient d33,eff shows also a weak dependence on the average tilt angle for films grown in a single layer, whereas it is strongly reduced for the films deposited in multiple layers. The least affected properties are obtained for the most epitaxial films, i.e. grown on a SrTiO3 epitaxial seed layer, by pulsed laser deposition. These films are intrinsically stable and do not require poling to acquire these stable properties.
Journal of Materials Chemistry | 2012
O. Yildirim; M.G. Maas; P.J. de Veen; Duc Minh Nguyen; David N. Reinhoudt; David H.A. Blank; Augustinus J.H.M. Rijnders; Jurriaan Huskens
Pt top contacts have been deposited by pulsed laser deposition (PLD) onto bare and tetradecylphosphate (TDP) self-assembled monolayer (SAM)-modified Nb-doped SrTiO3 (Nb-STO) substrates. For the SAM-modified substrates, electrochemical Cu deposition occurred only at the places where electrical shorts existed between the top contact and the substrate. A nearly perfect yield of top contacts without shorts was obtained, which shows the dense packing and robustness of the SAM. The SAM decreased the leakage current about 500 times compared to the bare substrate. Alkylphosphate SAMs on conducting metal oxide substrates can therefore be used as dielectric thin films for device fabrication.
APL Materials | 2017
Duc Minh Nguyen; Evert Pieter Houwman; Jan M. Dekkers; D.G. Schlom; Augustinus J.H.M. Rijnders
All-oxide free-standing cantilevers were fabricated with epitaxial (001)-oriented Pb(Zr0.52Ti0.48)O3 (PZT) and Pb(Zr0.52Ti0.48)0.99Nb0.01O3 (PNZT) as piezoelectric layers and SrRuO3 electrodes. The ferroelectric and piezoelectric hysteresis loops were measured. From the zero-bias values, the figure-of-merits (FOMs) for piezoelectric energy harvesting systems were calculated. For the PNZT cantilever, an extremely large value FOM = 55 GPa was obtained. This very high value is due to the large shifts of the hysteresis loops such that the zero-bias piezoelectric coefficient e31f is maximum and the zero-bias dielectric constant is strongly reduced compared to the value in the undoped PZT device. The results show that by engineering the self-bias field the energy-harvesting properties of piezoelectric systems can be increased significantly.
Materials Chemistry and Physics | 2013
Duc Minh Nguyen; Chi T.Q. Nguyen; Thong Quang Trinh; Tai Nguyen; Thao N. Pham; Augustinus J.H.M. Rijnders; Hung Ngoc Vu
23rd International Workshop on Oxide Electronics, WOE 2016 | 2016
Evert Pieter Houwman; Duc Minh Nguyen; Jan M. Dekkers; N. Hildenbrand; Hung Ngoc Vu; Augustinus J.H.M. Rijnders
22nd International Workshop on Oxide Electronics, WOE 2015 | 2015
Lin Li; Zhaoliang Liao; Duc Minh Nguyen; Evert Pieter Houwman; Gertjan Koster; Augustinus J.H.M. Rijnders
Archive | 2013
K. Elibol; Duc Minh Nguyen; Raymond Josephus Engelbart Hueting; Gertjan Koster; Augustinus J.H.M. Rijnders
Archive | 2012
X. Wan; Ruud Johannes Antonius Steenwelle; Duc Minh Nguyen; Evert Pieter Houwman; Jan M. Dekkers; David H.A. Blank; Augustinus J.H.M. Rijnders
Archive | 2012
Duc Minh Nguyen; Jan M. Dekkers; Ruud Johannes Antonius Steenwelle; X. Wan; Augustinus J.H.M. Rijnders
19th International Workshop on Oxide Electronics, WOE 2012 | 2012
Evert Pieter Houwman; Ruud Johannes Antonius Steenwelle; X. Wan; Duc Minh Nguyen; Jan M. Dekkers; Gertjan Koster; Augustinus J.H.M. Rijnders