An op amp will do it. But consider the fact that, unless you have a negative voltage power supply available (so that the op-amp is powered by + and - voltages), you can't amplify a voltage very near "0". If you can tolerate a little non-linearity near 0V, and you only have a positive supply available (say +5V), you can use a rail-to-rail input/rail-to-rail output type. A good place to look is -

http://www.national.com/cat/index.cgi?i=i//11