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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Not all solar energy capture devices make electricity directly.
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3 .For example, steam generated from solar energy can turn turbines, which then produce electricity.
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4 .And, in what could be especially useful in remote regions, solar steam can desalinate water and be used in sanitation and equipment sterilization.
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5 .Now a new technique looks to be the most efficient way yet created to use solar energy to generate steam.
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6 .To absorb sunlight, M.I.T.researchers created a porous disc of graphite flakes.
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7 .Underneath the disk is a layer of insulating carbon foam that floats on water.
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8 .The foam prevents heat from being lost to the water, and has a tangle of interconnected small pores.
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9 .As sun heats the graphite, it creates a pressure difference that pulls water up through the foam pores, like a sponge.
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10 .When the water hits the graphite hot spot, it turns into steam.
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11 .The scientists report that this inexpensive system reaches 85 percent efficiency in converting the solar energy into steam.
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12 .The study is in the journal Nature Communications.
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13 .The researchers hope to up the efficiency further with different materials or an improved design.
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14 .All of which could cause steampunk fans to update their wardrobes.
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15 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Cynthia Graber.
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