Vu Thi Thuy Duong
Vietnam Academy of Science and Technology
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Publication
Featured researches published by Vu Thi Thuy Duong.
Talanta | 2016
Vu Thi Thuy Duong; Vu Duong; Nghiem Thi Ha Lien; Tomoko Imasaka; Yuanyuan Tang; Shinpei Shibuta; Akifumi Hamachi; Do Quang Hoa; Totaro Imasaka
Polychlorinated biphenyls (PCBs) in transformer and food oils were measured using gas chromatography combined with multiphoton ionization mass spectroscopy. An ultrashort laser pulse emitting in the far-ultraviolet region was utilized for efficient ionization of the analytes. Numerous signal peaks were clearly observed for a standard sample mixture of PCBs when the third and fourth harmonic emissions (267 and 200nm) of a femtosecond Ti:sapphire laser (800nm) were employed. The signal intensities were found to be greater when measured at 200nm compared with those measured at 267nm, providing lower detection limits especially for highly chlorinated PCBs at shorter wavelengths. After simple pretreatment using disposable columns, PCB congeners were measured and found to be present in the transformer oils used in Vietnam.
Communications in Physics | 2011
Nghiem Thi Ha Lien; Vu Xuan Hoa; Vu Thi Thuy Duong; Nguyen Van Tinh; Tran Hong Nhung
The gold nanoparticle solutions are well known as an extremely sensitive biomedical analytical tool due to the strong dependence of their absorption in the visible range on the environment. In this work, the colloidal nano golds were synthesized from metal precursor chloroauric acid (HAuCl4) using trisodium citrate dehydrate (C6H5O7Na3) as reducing and stabilizing agents. The optical characterization absorption of colloidal gold solution have been investigated under the different synthetic conditions such as: reducing agent concentration, concentration of auric ion, pH, duration of reaction and aging time. The results show that the absorption and the stability of the colloidal gold nanoparticles depend robustly on the synthetic conditions and pH of environment.
Physica Status Solidi (a) | 2018
Vu Thi Thuy Duong; Anh D. Phan; Nghiem Thi Ha Lien; Do T. Hue; Do Quang Hoa; Do Thi Nga; Tran H. Nhung; Nguyen Ai Viet
We propose a new approach to understand the time-dependent temperature increasing process of gold-silica core-shell nanoparticles injected into chicken tissues under near-infrared laser irradiation. Gold nanoshells strongly absorb near-infrared radiations and efficiently transform absorbed energy into heat. Temperature rise given by experiments and numerical calculations based on bioheat transfer are in good agreement. Our work improves the analysis of a recent study [Richardson et al., Nano Lett. 9, 1139 (2009)] by including effects of the medium perfusion on temperature increase. The theoretical analysis can also be used to estimate the distribution of nanoparticles in experimental samples and provide a relative accuracy prediction for the temperature profile of new systems. This methodology would provide a novel and reliable tool for speeding up photothermal investigations and designing state-of-the-art photothermal devices.
Communications in Physics | 2014
Nghiem Thi Ha Lien; Vu Thi Thuy Duong; Vu Duong; Do Quang Hoa; Tran Hong Nhung
Gold nanoshells (GNSs) were grown on monodispersed aminoprotpyltriethoxysilane (APTES) functionalized of silica nanoparticles (NPs) cores with varying sizes ranging from 40-180 nm synthesized by Stober route. Gold shells were deposited onto the surface of silica NPs by tetrakis(hydroxymethyl) phosphonium chloride (THPC) and electroless gold plating method. The coverage of the gold nanoshells on the surfaces of the silica NPs was evaluated using UV-VIS/NIR spectrospcopy and transmission electron microscopy (TEM). The plasmon resonance wavelengths of these gold nanoshells were tunable from visible to near infrared region. The GNSs were also bioconjugated with anti-HER2 monoclonal antibody for diagnostic breast cancer cells using dark field microscope technique. These GNS NPs play a role as nanoheaters transforming light to heat. With the present of these GNS NPs at volume density of 3.6×1010 NPs.cm3 in chicken tissue samples, illuminated by 808 nm laser at the power density of 62 W.cm2 the temperature of tissue sample reachs 110 ̊ C after 20 minutes illumination.
Communications in Physics | 2011
Vu Thi Thuy Duong; Do Quang Hoa; Nguyen Thi Van; Nghiem Thi Ha Lien; Tran Hong Nhung; J. C. Brochon
Dye-doped ORMOSIL (organically modified silicate) nanoparticles (NPs) have significant advantages over single-dye labeling in signal amplification, photostability and surface modification for various biological applications. The dyes: Rhodamine 6G (R6G) and Rhodamine B (RB) were successfully incorporated into ORMOSIL nanoparticles fabricated by micellar nanochemistry from Trimethoxysilane CH3Si(OCH3)3 precursor. The optical characterization of dye-doped ORMOSIL NPs was studied in comparison with its of free dye in solution. The results shown that the photostability of ORMOSIL dye doped nanospheres is much improved in comparison with its of dye in solution. Other studies of the photophysical properties such as anisotropy, fluorescence lifetime and energy transfer were also done.
The Japan Society of Applied Physics | 2017
Vu Thi Thuy Duong; Thang Dinh Phan; Totaro Imasaka
The Japan Society of Applied Physics | 2017
Phan Dinh Thang; Vu Thi Thuy Duong; Totaro Imasaka
Communications in Physics | 2016
Vu Thi Thuy Duong; Trinh Thi Thuong; Nghiem Thi Ha Lien; Do Quang Hoa; Tran Hong Nhung
Communications in Physics | 2014
Hoa Quang Do; Nghiem Thi Ha Lien; Vu Thi Thuy Duong; Nguyen Thi Thanh Thuy; Do Quang Hoa
Bulletin of the American Physical Society | 2014
Tran Hong Nhung; Vu Thi Thuy Duong; Dustin Tracy; David Drosdoff; Lilia M. Woods; Huong Nguyen; Do Thi Nga; Nguyen Ai Viet; Anh D. Phan