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A Case of Nasal Septum Gossypiboma 14 Years After Septorhinoplasty
Yang Seungjoon,Bae Sohi,Seo Jayeong,Cho Hyung-Ju,Kim Chang-Hoon,하종균 대한비과학회 2022 Journal of rhinology Vol.29 No.2
Gossypiboma, an infrequent surgical complication, describes a mass of cotton material inadvertently left in the body cavity after an operation. It is an extremely rare iatrogenic complication of nasal surgery, with only a few cases reported in literature to date. Here we present a case of gossypiboma in the nasal septum of a 35-year-old male patient who previously underwent septorhinoplasty fourteen years prior. He was treated by endoscopic endonasal surgery to remove the lesion. Pathologic findings showed a foreign body (gauze filament) with a giant cell reaction. This report will be helpful for treating patients with similar histories in the future.
Band Alignment at Au/MoS<sub>2</sub> Contacts: Thickness Dependence of Exfoliated Flakes
Sohn, Ahrum,Moon, Hankyoul,Kim, Jayeong,Seo, Miri,Min, Kyung-Ah,Lee, Sang Wook,Yoon, Seokhyun,Hong, Suklyun,Kim, Dong-Wook American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.40
<P>We investigated the surface potential (V-surf) of exfoliated MoS2 flakes on bare and Au-coated SiO2/Si substrates using Kelvin probe force microscopy. The V-surf of MoS2 single layers was larger on the Au-coated substrates than on the bare substrates; our theoretical calculations indicate that this may be caused by the formation of a larger electric dipole at the MoS2/Au interface leading to a modified band alignment. V-surf decreased as the thickness of the flakes increased until reaching the bulk value at a thickness of similar to 20 nm (similar to 30 layers) on the bare and similar to 80 nm (similar to 120 layers) on the Au-coated substrates, respectively. This thickness dependence of V-surf was attributed to electrostatic screening in the MoS2 layers. Thus, a difference in the thickness at which the bulk V-surf appeared suggests that the underlying substrate has an effect on the electric-field screening length of the MoS2 flakes. This work provides important insights to help understand and control the electrical properties of metal/MoS2 contacts.</P>