Background and Aims: Magnetic resonance imaging (MRI) plays an essential role in molecular imaging by delivering the contrast agent into targeted cells. The aim of this study was to evaluate the use of magnetic nanoparticles containing iron oxide and silver (Fe3O4@Ag core-shell nanoprobe) as a contrast agent for the detection of ovarian cancer cell line ovcar-3. Materials and Methods: Co-preci...

Inexpensive, rapid, and reliable methods of detection are crucial to the control of toxicological investigations. Here we report a highly sensitive, selective and cost effective method for the detection of trace amounts of clonazepam based on gold nanoparticles (AuNPs) in the presence of melamine. Hydrogen bonding interactions between clonazepam and melamine resulted in the aggregation of AuNPs...

The ultrasensitive detection of human prostate metastatic cancer cells (Du-145) was investigated through a novel electrochemical cytosensor. The proposed biosensor was simultaneously developed via two approaches: multivalent identification and signal amplification. Herein, anti-CD166 monoclonal antibody-modified gold electrode was applied to capture and recognize target cells (Du-145). Also, a ...

Cancer is a leading cause of death worldwide and accounts for several millions of deaths every year. The survival of cancer patients is strongly associated with the stage of the tumor at the time of diagnosis. Identifying the cancer at the cellular level in an early stage before metastasis holds great promise for increasing the survival of cancer patients. A major focus of research towards this...

Single molecule tracking in live cells is the ultimate tool to study subcellular protein dynamics, but it is often limited by the probe size and photostability. Because of these issues, long-term tracking of proteins in confined and crowded environments, such as intracellular spaces, remains challenging. We have developed a novel optical probe consisting of 5 nm gold nanoparticles functionalize...

Inorganic nanoprobes with ultrasmall size have the advantage of kidney clearance, which was very meaningful for achieving clinical application. In this article, Mn2+-doped gold nanoclusters (Mn-AuNCs) were synthesized, by magnetic resonance imaging (MRI) and tumor-microenvironment-responsive chemodynamic therapy (CDT) photodynamic (PDT) achieved. The results showed that...

We are now constructing the ion nanoprobe, a new instrument designed for isotopic and chemical analysis at the few-nm scale. The new instrument will combine a recently developed high resolution liquid metal ion gun (LMIG), tunable solid state lasers for laser resonant ionization, a molecular fluorine excimer laser for UV ionization, and high transmission, high resolution timeof-flight mass spec...

A simple and rapid fluorescent method was developed for the in situ evaluation of cell surface carbohydrate by homogeneous specific recognition of a quantum dot-lectin nanoprobe to mannosyl groups on the cell surface. The strategy was further used for dynamically monitoring the alteration of cell surface carbohydrate expression in response to drugs.