Nano pH Meter

Rice scientists make first nanoscale pH meter. ‘Using unique nanoparticles that convert laser light into useful information, Rice University scientists have created the world’s first nano-sized pH meter. The discovery, which appears online this week in the journal Nano Letters, presents biologists with the first potential means of measuring accurate pH changes over a wide pH range in real-time inside living tissue and cells. For example, pH may be useful in determining whether or not some cancer tumors are malignant. With current methods, a piece of the tumor would need to be physically removed via biopsy – a painful and invasive procedure – and visually evaluated under a microscope. Halas said LANP’s new nano-pH meter could be used instead as an “optical biopsy” to measure the pH inside the tumor with nothing more invasive than an injection.’



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