How micron-sized dust particles determine the chemistry of our Universe.

How micron-sized dust particles determine the chemistry of our Universe.
复制标题

DOI:
10.1038/srep01338
复制
发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Cazaux S
Cazaux S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dulieu F;Congiu E;Noble J;Baouche S;Chaabouni H;Moudens A;Minissale M;Cazaux S

文献摘要

参考文献

被引文献

相似文献

在恒星和行星形成的环境中,大约百分之一的质量是以微米大小的颗粒形式存在的,称为尘埃。无论这些尘埃颗粒看起来多么小和微不足道,它们都负责产生我们宇宙中观察到的最简单(H2)到最复杂(氨基酸)的分子。尘埃颗粒被认为是产生化学物质的强大纳米工厂。然而,将尘埃上的物种转化为气体物种的机制仍然难以捉摸。在这里,我们报告的实验证据表明,物种形成的星际尘埃类似物可以直接释放到气体中。这个过程称为化学解吸(图1),可以在气相化学中占主导地位,超过十个数量级。它还决定了哪些物种留在表面,并可参与随后的复杂化学反应,形成生命出现所必需的分子。
In the environments where stars and planets form, about one percent of the mass is in the form of micro-meter sized particles known as dust. However small and insignificant these dust grains may seem, they are responsible for the production of the simplest (H2) to the most complex (amino-acids) molecules observed in our Universe. Dust particles are recognized as powerful nano-factories that produce chemical species. However, the mechanism that converts species on dust to gas species remains elusive. Here we report experimental evidence that species forming on interstellar dust analogs can be directly released into the gas. This process, entitled chemical desorption (fig. 1), can dominate over the chemistry due to the gas phase by more than ten orders of magnitude. It also determines which species remain on the surface and are available to participate in the subsequent complex chemistry that forms the molecules necessary for the emergence of life.
DOI: 10.1051/0004-6361/201014026
发表时间: 2010-11-01
影响因子: 6.5
作者:
Cazaux, S.;Cobut, V.;Caselli, P.
通讯作者: Caselli, P.
DOI: 10.1086/381775
发表时间: 2004-03-20
影响因子: 4.9
作者:
Cazaux, S;Tielens, AGGM
通讯作者: Tielens, AGGM
DOI: 10.1086/521014
发表时间: 2007-10-10
影响因子: 4.9
作者:
Cuppen, H. M.;Herbst, Eric
通讯作者: Herbst, Eric
DOI: 10.1086/591506
发表时间: 2008-10-20
影响因子: 4.9
作者:
Ioppolo, S.;Cuppen, H. M.;Linnartz, H.
通讯作者: Linnartz, H.
DOI: 10.1051/0004-6361:20030344
发表时间: 2003-05-01
影响因子: 6.5
作者:
Pagani, L;Olofsson, AOH;Wilson, CD
通讯作者: Wilson, CD