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Quantum Dot‐mediated Photoproduction of Reactive Oxygen Species for Cancer Cell Annihilation
While semiconductor quantum dots produce little singlet oxygen, they may undergo Type I photoreactions to produce other reactive oxygen species (ROS) to kill cells. CdTe quantum dots coated with… Expand
Forensic analysis of laser printed ink by X-ray fluorescence and laser-excited plume fluorescence.
- P. Chu, B. Y. Cai, Yeuk Ki Tsoi, Ronald Yuen, K. S. Leung, N. Cheung
- Chemistry, Medicine
- Analytical chemistry
- 24 April 2013
We demonstrated a minimally destructive two-tier approach for multielement forensic analysis of laser-printed ink. The printed document was first screened using a portable-X-ray fluorescence (XRF)… Expand
Minimally destructive and multi-element analysis of aluminium alloys by ArF laser-induced atomic emissions
Aluminium alloys were analysed by ArF laser-induced atomic emissions of laser plumes. The vapour plume was created by a Nd:YAG laser pulse at 1064 nm. Unlike laser-excited atomic fluorescence, when… Expand
Sensitive elemental analysis by ArF laser-induced fluorescence of laser ablation plumes: Elucidation of the fluorescence mechanism
Numerous atomic analytes in plumes produced by pulsed-laser ablation fluoresced upon ArF laser irradiation. The likely mechanism was photoexcitation to levels near the ionization limit. These levels… Expand
Multi-element analysis by ArF laser excited atomic fluorescence of laser ablated plumes: Mechanism and applications
A new multi-element analysis technique based on laser-excited atomic fluorescence was reviewed. However, the one-wavelength-one-transition constraint was overcome. Numerous elements were induced to… Expand
Photodynamic activities of sulfonamide derivatives of porphycene on nasopharyngeal carcinoma cells.
Two sulfonamide derivatives of porphycene, namely PS6 and PS6A, were synthesized, and their photodynamic efficacies on the nasopharyngeal carcinoma (NPC) cell line NPC/CNE-2 were evaluated. By… Expand
Measuring binding kinetics of ligands with tethered receptors by fluorescence polarization and total internal reflection fluorescence.
Binding kinetics of nuclear receptors and their specific ligands was measured using polarization anisotropy complemented with total internal reflection fluorescence. Binding affinities of tethered… Expand
Single-Shot Elemental Analysis of Liquids Based on Laser Vaporization at Fluences below Breakdown
A novel yet simple spectrochemical technique for analyzing liquid samples has been demonstrated, which is based on pulsed laser vaporization at sub-breakdown fluences, together with acoustic… Expand
Improvement of the photostability of thiol-capped CdTe quantum dots in aqueous solutions and in living cells by surface treatment
The surface treatment of thiol-capped CdTe quantum dots (QDs) was carried out with a small amount of sodium borohydride (NaBH4) in aqueous solution at room temperature. The treatment effectively… Expand
The mechanism of ArF laser-induced fluorescence of dense plume matter
We perform two-pulse experiments to elucidate the mechanism of laser induced fluorescence (LIF) of dense vapor plumes. The first ns laser pulse at 355 nm gently ablates a brass or tin–lead target to… Expand