Different kinds of clay contain different minerals such as silicon or iron dioxide.

VOA: special.2009.09.09

The ocean floor is basalt rock, a mixture of silicon and magnesium.

VOA: special.2011.01.04

Most sand is made of quartz, a hard silicon crystal.

VOA: special.2010.01.04

Changes are taking place in Silicon Valley in California.

VOA: special.2011.01.28

Salman Khan lives in California's Silicon Valley, with his wife, a rheumatologist in training at Stanford University, and their new baby.

VOA: standard.2010.03.26

than formerly was recorded." Silicon Valley attorney Gary Reback represents the Open Book Alliance,whose members include Microsoft and Amazon.com.

VOA: standard.2009.12.31

And that sparse array of wires has exactly the same light absorption and electricity-collection properties as the conventional silicon wafer cell."

VOA: standard.2010.02.19

The tiny silicon wires stick up from the base,or substrate, looking something like a microscopic hair brush.

VOA: standard.2010.02.19

After visiting Silicon Valley, President Medvedev comes to Washington for a brief summit with President Barack Obama.

VOA: standard.2010.06.18

And because the key component of solar cells is an expensive, highly purified form of silicon, there's a real economic benefit to this design.

VOA: standard.2010.02.19

Solar cells,or photovoltaics, are widely made using wafers of silicon that are stiff and brittle.

VOA: standard.2010.02.19

But the silicon is what converts light into electricity, so you might think using so much less silicon would reduce the electrical output, but Atwater says that's not the case.

VOA: standard.2010.02.19

Those are questions that don't have answers yet." Analysts say President Medvedev's idea of creating a Russian Silicon Valley is tied to his broader plan to modernize the country's economy.

VOA: standard.2010.06.18

The high point of President Medvedev's stay in the United States will be his visit to Silicon Valley - an area in northern California known for its high-tech companies, venture capitalists and forward-looking entrepreneurs.

VOA: standard.2010.06.18

"Our technology uses 50-100 times less silicon."

VOA: standard.2010.02.19

David Kramer,former senior State Department official in the George W.Bush administration, says the Russian president will be in northern California to try and form business partnerships and to learn how Silicon Valley got started.

VOA: standard.2010.06.18

Experts,such as Robert Legvold from Columbia University, say Mr.Medvedev is trying to generate interest in his plan to create a Russian Silicon Valley in the suburbs of Moscow known as the Skolkova Innovation Initiative.

VOA: standard.2010.06.18

"You really need system-wide Skolkovas - Silicon Valley - otherwise it ends up just like under Catherine the Great when they imported a lot of German tradesmen and planted them in various settlements - but they were fairly self-contained.

VOA: standard.2010.06.18

"So when Medvedev committed himself to the idea of creating a Silicon Valley, and there were a number of parts, different cities in Russia that vied for its location, it was decided to put it in this park.

VOA: standard.2010.06.18