“Vacuum and Surface Science” is an academic journal published by The Japan Society of Vacuum and Surface Science. The first issue was published in January, 2018. The predecessor journals are “Journal of the Vacuum Society of Japan (JVSJ)” and “Hyomen Kagaku (Journal of the Surface Science Society of Japan)”. The journal is aiming to expand into new fields while following the article types published in the predecessors. The journal starts from Vol. 61, taking over the volume number of the long history of JVSJ.
Predecessors ▶ Hyomen Kagaku (The Journal of Surface Science Society of Japan) Vol. 1 (1980) to Vol. 38 (2017) Online ISSN : 1881-4743, Print ISSN : 0388-5321 ▶ Journal of the Vacuum Society of Japan Vol. 51 (2008) to Vol. 60 (2017) Online ISSN : 1882-4749, Print ISSN : 1882-2398
Other predecessors (JVSJ is a successor of following journals.) ▶ Shinku (Vacuum) Vol. 1 (1958) to Vol. 50 (2007) Online ISSN : 1880-9413, Print ISSN : 0559-8516 ▶ Shinku Kogyo (Vacuum Industry) Vol. 1 (1954) to Vol. 5 (1958) Online ISSN : 1883-7174 ▶ Shinku Gijutsu (Vacuum Technolgoy) Vol. 1 (1950) to Vol. 8 (1957) Online ISSN : 1883-7182
Frequency modulation atomic force microscopy (FM-AFM) can simultaneously detect the conservative and non-conservative force interactions between a tip and a sample, based on the resonance frequency shift (Δf) and the mechanical energy dissipation of an oscillating cantilever, respectively. Here, we outline the energy dissipation measured by FM-AFM and introduce our recent results obtained through measurement of the energy dissipation. First, surface resistances can be evaluated in non-contact using the proportional relationship between the energy dissipation due to Joule heat and Δf due to the electrostatic attractive force. Second, Si adatoms on a Si(111)-(7×7) surface, which are observed to be static by FM-AFM, can move back and force between their stable sites and their neighboring quasi-stable sites, detected by measuring of the energy dissipation.
This article provides an overview of the authors' activity on organic secondary ion mass spectrometry (organic SIMS) using ionic liquids. Ionic liquids, i.e., molten salts with a melting point less than 100℃, have negligible vapor pressures, so that they are compatible with ultra-high vacuum. They are divided into two groups : aprotic ionic liquids and protic ionic liquids. Both ionic liquids were tested as liquid matrices and as primary ion beams in organic SIMS. Protic ionic liquids proved to be effective to enhance molecular secondary ion intensities, whereas aprotic ionic liquids were not useful. Among ionic liquids, alkylammonium titrates such as propylammonium nitrate will be most promising for organic SIMS.
There have been a lot of artificial superhydrophobic surfaces, however, those are difficult to use in daily purposes because of their brittle, stiff and breakable properties. We have been reported fabrication of superhydrophobic microstructured vulcanized rubber surfaces by using silicon microstructures as mold during their vulcanization process. Furthermore, the arrangement of microstructures could be repeatedly transformed from a hexagonal to linear patterns by elongations and superhydrophobicity was kept during elongation process. In this report, we prepared other type of superhydrophobic microstructured vulcanized rubber surfaces, which can be changed surface wettability by stretching. The superhydrophobic microstructured vulcanized rubber surfaces were prepared by using a silicon microstructures as mold. After observation of surface structures and wettability by laser microscopy and water contact angle analyzer, we took high-speed photography of water droplets felled to the rubber surfaces with different elongation rates, and theoretically discussed the differences of water behaviors.