Surface force confinement cell for neutron reflectometry studies of complex fluids under nanoconfinement
Surface force confinement cell for neutron reflectometry studies of complex fluids under nanoconfinement
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DOI：
10.1063/1.3005483
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发表时间：
2008-10-01
影响因子：
1.6
通讯作者：
Mays, Jimmy
中科院分区：
文献类型：
--
作者：
Cho, Jae-Hie J.;Smith, Gregory S.;Mays, Jimmy
本文描述了一种新型的中子表面力约束池（NSFCC）。NSFCC配备了液压动力原位，时间稳定，力控制系统，用于纳米约束复杂流体系统的同步中子反射计研究。用限制在两个相对的二嵌段共聚物（聚苯乙烯+聚2-乙烯基吡啶）涂覆的石英基底之间的氘代甲苯进行的测试测量证明了NSFCC的能力。随着液压施加的力的增加，一系列明确的减少分离观察到中子反射率测量。在测量过程中没有观察到用于控制表面分离的液压的明显变化，证明了装置的高稳定性。这种新设计的NSFCC引入了更高水平的控制研究的限制和随之而来的有限尺寸的影响，在各种复杂的流体和软凝聚态系统的纳米结构。
In this paper, we describe the construction of a new neutron surface force confinement cell (NSFCC). The NSFCC is equipped with hydraulically powered in situ, temporally stable, force control system for simultaneous neutron reflectometry studies of nanoconfined complex fluid systems. Test measurements with deuterated toluene confined between two opposing diblock copolymer (polystyrene+poly 2-vinylpyridine) coated quartz substrates demonstrate the capabilities of the NSFCC. With increasing hydraulically applied force, a series of well-defined decreasing separations were observed from neutron reflectivity measurements. No noticeable changes in the hydraulic pressure used for controlling the surface separation were observed during the measurements, demonstrating the high stability of the apparatus. This newly designed NSFCC introduces a higher level of control for studies of confinement and consequent finite size effects on nanoscale structure in a variety of complex fluid and soft condensed matter systems.