Unfortunately, Monatagnier has pulled a Linus Pauling in his old age and become a big supporter of homeopathy. In 2009, he conducted an "experiment" on diluted DNA in which he purported the DNA emitted an electromagnetic signal after it had been diluted down to nothing. He used his laptop and a cheap amp to do the experiment, so it's 99.9% certain that he just picked up some white noise. Nevertheless, woo-meisters like Deepak Chopra and Dana Ullman have held this up as vindication of homeopathic "theories," especially since Montagnier has become something of an outspoken apologist for homeopathy since he conducted this "experiment." If a Nobel-winner says it, it must be true!
The fact that the effect lasts a few picoseconds, has not been reproduced by other scientists, was self-published without peer-review, and according to Montagnier himself the research "cannot extrapolate it to the products used in homeopathy". Apparently his homeopathic infallibility does not extend to knowing the applicability of his own research.