Muhammad Sabbtain Abbas, Bilal Jehanzaib, Shahzad Hussain, Abid Mahmood, Riaz Ahmad
{"title":"低能 Cs+ 离子诱导 PADC 聚合物溅射破碎的质谱研究。","authors":"Muhammad Sabbtain Abbas, Bilal Jehanzaib, Shahzad Hussain, Abid Mahmood, Riaz Ahmad","doi":"10.1002/jms.5002","DOIUrl":null,"url":null,"abstract":"<p>In this study, low-energy cesium (Cs<sup>+</sup>) ion-induced sputtered fragmentation of poly allyl diglycol carbonate (PADC) was investigated using mass spectrometry. The collision-induced dissociation mechanism revealed emission of various fragments, including monoatomic (H<sup>−</sup>, C<sub>1</sub><sup>−</sup>, O<sub>1</sub><sup>−</sup>), diatomic (C<sub>2</sub><sup>−</sup>), and multiatomic (C<sub>3</sub><sup>−</sup>, CO<sub>2</sub><sup>−</sup>, C<sub>2</sub>O<sub>2</sub><sup>−</sup>, C<sub>3</sub>O<sub>2</sub><sup>−</sup>) species within the Cs<sup>+</sup> ion energy range of 1–5 keV. The anion current of these fragments exhibited a linear increase with rising incident Cs<sup>+</sup> ion energy, indicating a corresponding rise in fragment abundance. Analysis of normalized yield indicated that at 1 keV incident energy, the dominant fragment was monoatomic hydrogen (H<sup>−</sup>), followed by diatomic carbon (C<sub>2</sub><sup>−</sup>), monoatomic carbon (C<sub>1</sub><sup>−</sup>), and monoatomic oxygen (O<sub>1</sub><sup>−</sup>). Although C<sub>2</sub><sup>−</sup> remained dominant up to 5 keV, other fragments exhibited varying normalized yields at different ion energy steps. The sputter yield estimation revealed that monoatomic hydrogen (H<sup>−</sup>) and diatomic carbon (C<sub>2</sub><sup>−</sup>) exhibited the highest yields, increasing exponentially beyond 3 keV, while multiatomic fragments like C<sub>3</sub><sup>−</sup>, CO<sub>2</sub><sup>−</sup>, C<sub>2</sub>O<sub>2</sub><sup>−</sup>, and C<sub>3</sub>O<sub>2</sub><sup>−</sup> displayed the lowest yields. The sputter dissociation mechanism pointed to dehydrogenation, chain scission, and bond breakage as the primary processes during low-energy Cs<sup>+</sup> ion impact. Postsputtering Scanning Electron Mircoscope (SEM) micrographs show craters, pits, and micropores on the PADC surface, indicating significant surface degradation. X-ray Diffraction (XRD) spectra exhibited reduced diffraction intensity, while Fourier Transform Infrared Spectroscopy (FTIR) analysis indicated the absence of molecular bands in the IR spectrum, confirming extensive surface damage due to Cs<sup>+</sup> ion-induced sputtering.</p>","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mass spectrometric study of low energy Cs+ ion-induced sputtered fragmentation of PADC polymer\",\"authors\":\"Muhammad Sabbtain Abbas, Bilal Jehanzaib, Shahzad Hussain, Abid Mahmood, Riaz Ahmad\",\"doi\":\"10.1002/jms.5002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this study, low-energy cesium (Cs<sup>+</sup>) ion-induced sputtered fragmentation of poly allyl diglycol carbonate (PADC) was investigated using mass spectrometry. The collision-induced dissociation mechanism revealed emission of various fragments, including monoatomic (H<sup>−</sup>, C<sub>1</sub><sup>−</sup>, O<sub>1</sub><sup>−</sup>), diatomic (C<sub>2</sub><sup>−</sup>), and multiatomic (C<sub>3</sub><sup>−</sup>, CO<sub>2</sub><sup>−</sup>, C<sub>2</sub>O<sub>2</sub><sup>−</sup>, C<sub>3</sub>O<sub>2</sub><sup>−</sup>) species within the Cs<sup>+</sup> ion energy range of 1–5 keV. The anion current of these fragments exhibited a linear increase with rising incident Cs<sup>+</sup> ion energy, indicating a corresponding rise in fragment abundance. Analysis of normalized yield indicated that at 1 keV incident energy, the dominant fragment was monoatomic hydrogen (H<sup>−</sup>), followed by diatomic carbon (C<sub>2</sub><sup>−</sup>), monoatomic carbon (C<sub>1</sub><sup>−</sup>), and monoatomic oxygen (O<sub>1</sub><sup>−</sup>). Although C<sub>2</sub><sup>−</sup> remained dominant up to 5 keV, other fragments exhibited varying normalized yields at different ion energy steps. The sputter yield estimation revealed that monoatomic hydrogen (H<sup>−</sup>) and diatomic carbon (C<sub>2</sub><sup>−</sup>) exhibited the highest yields, increasing exponentially beyond 3 keV, while multiatomic fragments like C<sub>3</sub><sup>−</sup>, CO<sub>2</sub><sup>−</sup>, C<sub>2</sub>O<sub>2</sub><sup>−</sup>, and C<sub>3</sub>O<sub>2</sub><sup>−</sup> displayed the lowest yields. The sputter dissociation mechanism pointed to dehydrogenation, chain scission, and bond breakage as the primary processes during low-energy Cs<sup>+</sup> ion impact. Postsputtering Scanning Electron Mircoscope (SEM) micrographs show craters, pits, and micropores on the PADC surface, indicating significant surface degradation. X-ray Diffraction (XRD) spectra exhibited reduced diffraction intensity, while Fourier Transform Infrared Spectroscopy (FTIR) analysis indicated the absence of molecular bands in the IR spectrum, confirming extensive surface damage due to Cs<sup>+</sup> ion-induced sputtering.</p>\",\"PeriodicalId\":16178,\"journal\":{\"name\":\"Journal of Mass Spectrometry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-02-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Mass Spectrometry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/jms.5002\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"BIOCHEMICAL RESEARCH METHODS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Mass Spectrometry","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jms.5002","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
Mass spectrometric study of low energy Cs+ ion-induced sputtered fragmentation of PADC polymer
In this study, low-energy cesium (Cs+) ion-induced sputtered fragmentation of poly allyl diglycol carbonate (PADC) was investigated using mass spectrometry. The collision-induced dissociation mechanism revealed emission of various fragments, including monoatomic (H−, C1−, O1−), diatomic (C2−), and multiatomic (C3−, CO2−, C2O2−, C3O2−) species within the Cs+ ion energy range of 1–5 keV. The anion current of these fragments exhibited a linear increase with rising incident Cs+ ion energy, indicating a corresponding rise in fragment abundance. Analysis of normalized yield indicated that at 1 keV incident energy, the dominant fragment was monoatomic hydrogen (H−), followed by diatomic carbon (C2−), monoatomic carbon (C1−), and monoatomic oxygen (O1−). Although C2− remained dominant up to 5 keV, other fragments exhibited varying normalized yields at different ion energy steps. The sputter yield estimation revealed that monoatomic hydrogen (H−) and diatomic carbon (C2−) exhibited the highest yields, increasing exponentially beyond 3 keV, while multiatomic fragments like C3−, CO2−, C2O2−, and C3O2− displayed the lowest yields. The sputter dissociation mechanism pointed to dehydrogenation, chain scission, and bond breakage as the primary processes during low-energy Cs+ ion impact. Postsputtering Scanning Electron Mircoscope (SEM) micrographs show craters, pits, and micropores on the PADC surface, indicating significant surface degradation. X-ray Diffraction (XRD) spectra exhibited reduced diffraction intensity, while Fourier Transform Infrared Spectroscopy (FTIR) analysis indicated the absence of molecular bands in the IR spectrum, confirming extensive surface damage due to Cs+ ion-induced sputtering.
期刊介绍:
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