Translational cooling and storage of protonated proteins in an ion trap at subkelvin temperatures
Translational cooling and storage of protonated proteins in an ion trap at subkelvin temperatures
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亚开尔文温度下离子阱中质子化蛋白质的平移冷却和储存
DOI：
10.1103/physreva.78.061401
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发表时间：
2008
影响因子：
2.9
通讯作者：
S. Schiller
中科院分区：
文献类型：
--
作者：
D. Offenberg;C. Zhang;Ch. Wellers;B. Roth;S. Schiller
气相多电荷蛋白质已被同情地冷却到低于1 K的平移温度的库仑相互作用与激光冷却的钡离子在线性离子阱。在一种情况下，53个细胞色素c分子（质量约12390 amu，电荷+17 e）的系综被约160个激光冷却的钡离子冷却到低于0.75 K。已经观察到超过20分钟的储存时间，并且可以很容易地延长到超过一个小时。该技术适用于各种复杂分子。
Gas-phase multiply charged proteins have been sympathetically cooled to translational temperatures below 1 K by Coulomb interaction with laser-cooled barium ions in a linear ion trap. In one case, an ensemble of 53 cytochrome c molecules (mass ~ 12390 amu, charge +17 e) was cooled by ~ 160 laser-cooled barium ions to less than 0.75 K. Storage times of more than 20 minutes have been observed and could easily be extended to more than an hour. The technique is applicable to a wide variety of complex molecules.