首页
登录
职称英语
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of
游客
2024-09-25
1
管理
问题
Today in mind-bendingly cool stuff that nanoparticles(纳米粒子)can do: A team of researchers at Rice University in Texas has demonstrated a mechanism by which they can create steam in just seconds by focusing sunlight on a mixture of water and nanoparticles. This isn’t just some artificial means of lowering boiling point either: this solar powered "boiler" can produce steam before the water even gets warm to the touch, without ever bringing the aggregate water to a boil.
Right now this research is very much still in the lab, and the researchers aren’t sure exactly how far they can push it. But it doesn’t take much to imagine the possibilities for a steam generator that runs solely on water and sunlight.
The technology works by mixing a small amount of either carbon or gold-coated silicon dioxide(二氧化硅)nanoparticles, each just one-tenth the diameter of a single human hair, with water in a glass vessel. Their small diameters—smaller than the wavelength of visible light—means that they can absorb most of a light wave’s energy rather than scattering it. So when sunlight is focused on the vessel with a lens, the particles quickly become quite hot—hot enough to vaporize(蒸发)the water directly surrounding it.
This creates a bubble of steam that envelopes the nanoparticle, which is now insulated from the cooler liquid water by the steam, which allows it to grow hotter still, vaporizing more of the water immediately around it. At some point the nanoparticle and its steam envelope become large enough to grow buoyant, at which point the whole steam bubble— particle and all—floats to the surface. The steam is released into the air, the particle falls back into the cooler water and sinks back down until it begins to absorb sunlight and heat again, at which point the process starts all over.
Multiply that by the number of nanoparticles in the mixture, and you have something of a simulated boil, but one that doesn’t require the entire pot of water to reach boiling point before the first steam bubbles head to the surface. You can think of it as a way of micromanaging the boiling process, specifically heating some parts of the water(where it touches the nanoparticles)while leaving the rest of the water cool. And the particles themselves are completely durable—they keep absorbing, heating, cooling, and absorbing again, with no need to replace them.
Pretty nuts, no? It spells an interesting future for solar power in general, but more specifically it’s easy to see how a cheap and abundant source of steam, even in low specific volumes, could be used to do anything from generate electricity and heat to lower the energy intensive nature of certain processes like water desalinization(脱盐). As the WaPo points out, the last time someone came up with a cheap and easy way to generate and harness abundant steam it completely changed the world. So there’s that. [br] We can infer from the passage that______.
选项
A、when put into water, nanaoparticles are highly active and hot enough to vaporize it
B、the steam bubble with some nanoparticles in it would float to the surface with steam released
C、once the nanoparticles are used up, new ones should be put into the water again
D、efficient use of steam may reduce the energy cost in some industrial processes
答案
D
解析
推断题。根据最后一段,使用纳米粒子降低了产生蒸汽的成本,操作起来高效便捷,这在诸如发电、产生热量、降低脱盐等过程的能源密集型性质上具有重要意义,[D]“蒸汽的高效利用可能会降低某些工业过程中的能源消耗。”表述正确,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3773462.html
相关试题推荐
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
PASSAGEFOUREntire语义题。根据第一段最后一句,这种通过太阳光和纳米粒子产生蒸汽的方法不再像以前那样必须将整壶水煮沸即可产生蒸汽;文章第五段第一
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
Todayinmind-bendinglycoolstuffthatnanoparticles(纳米粒子)cando:Ateamof
随机试题
黄河是亚洲第三、世界第六长的河流。“黄”这个字描述的是其河水浑浊的颜色。黄河发源于青海,流经九个省份,最后注入渤海。黄河是中国赖以生存的几条河流之一。黄
SpeakerA:Hello,Iwanttobuysomeclothesformygirlfriendforherbirthdayp
TheUnitedStatesgovernmentpublishesguidelinesforappropriatenutrienti
It’sabrandnewworld--aworldbuiltaroundbrands.Hard-charging,noise-m
Retrofittinghousestouselessenergys
简述社会基本矛盾的内容以及它们之间的关系。
长于活血化瘀的是A.山楂炭B.焦山楂C.山药D.白术E.山楂
不属于促进病人休息的护理措施的是A.做好心理护理,解除焦虑 B.各种诊疗护理活
赵某向钱某购买一批瓷砖,价款为5万元,合同履行前,钱某未经赵某的同意,将价款债权
背景资料:某工业项目,建设单位委托了一家监理单位协助组织工程招标并负责施工监理工
最新回复
(
0
)