Petroleum pollution sensing at ppb level using quartz crystal resonators sputtered with porous polyethylene under photo-excitation
Petroleum pollution sensing at ppb level using quartz crystal resonators sputtered with porous polyethylene under photo-excitation
复制标题
使用光激发下溅射多孔聚乙烯的石英晶体谐振器进行 ppb 级石油污染传感
DOI：
10.1016/s0925-4005(99)00509-2
复制
发表时间：
2000
影响因子：
8.4
通讯作者：
T. Katoh
中科院分区：
文献类型：
--
作者：
I. Sugimoto;M. Nakamura;S. Ogawa;M. Seyama;T. Katoh
射频(R.F.)由聚乙烯颗粒烧结而成的多孔聚乙烯(PE)圆盘可被溅射成碳氢化合物-聚合物薄膜，作为石英晶体谐振器传感器的化学传感覆盖层，可以检测到低百万分之一(Ppb)的石油烃蒸气。这些薄膜的蒸汽吸收能力受到所使用的溅射方法的深刻影响；它们通过紫外线(UV)照射的光激发增强，而通过长期处理或水处理引起的碳化而降低。PE薄膜，特别是光激发PE薄膜，具有表面光滑、原子密度高、氢含量高、悬键寿命长等特点。光激发PE膜能够探测ppb以下的线性碳氢化合物(>；C12)蒸气。在9%相对湿度(RH)下用水蒸气预吸附可提高传感器对石油烃的传感能力。对于d-苯丙氨酸溅射膜，这种水处理对石油烃吸附的影响尤为显著。
Radio-frequency (r.f.) sputtering of a porous polyethylene (PE) disk made by sintering PE granules can be used to form hydrocarbon-polymer films applied as the chemical-sensing overlayers of quartz crystal resonator sensors that can detect petroleum hydrocarbon vapors at low parts-per-billion (ppb) levels. The vapor-sorption capabilities of these films are profoundly affected by the sputtering method used; they are enhanced by photo-excitation through irradiation using ultraviolet (UV) light, and reduced by carbonization induced by long-term processing or by water-treatment. The PE films, especially photo-excited PE film, are characterized by a smooth surface, a high atomic density with a high hydrogen content, and dangling-bond longevity. Photo-excited PE film are capable of detecting linear hydrocarbon (>C12) vapors below the ppb level. Pre-sorption with water vapor at 9% relative humidity (RH) can enhance the sensing abilities of sensors for petroleum hydrocarbons. The effect of this water treatment on petroleum hydrocarbon sorption is especially prominent for d-phenylalanine-sputtered film.