飞行时间二次离子质谱(time-of-flight secondary ion mass spectrometry,TOF-SIMS)作为一种高灵敏度、高分辨率的表面分析技术,在材料科学领域应用广泛。聚焦于TOF-SIMS在钢铁材料分析中的应用,探讨了其在薄膜/钝化膜分析、微量元素残...飞行时间二次离子质谱(time-of-flight secondary ion mass spectrometry,TOF-SIMS)作为一种高灵敏度、高分辨率的表面分析技术,在材料科学领域应用广泛。聚焦于TOF-SIMS在钢铁材料分析中的应用,探讨了其在薄膜/钝化膜分析、微量元素残留、晶界富集、表面基团表征及氢元素分析等方面的潜力。凭借高空间分辨率和卓越的化学灵敏度,TOF-SIMS能提供高精度的表面成分分布、深度剖析与三维成像结果,有效克服了能量色散X射线光谱(EDS)等传统分析方法在灵敏度与元素检测范围上的局限性。通过镀锡板黄斑缺陷、ZM镀层钢板残油及BW600钢晶界元素富集等案例,展示了该技术的实际应用。特别是在氢脆研究中,TOF-SIMS能够高效、精确地表征氢在材料中的分布,为揭示氢脆机理提供了独特优势。综上,TOF-SIMS技术在钢铁材料缺陷分析中具有广阔的应用前景,可为钢铁行业提供精准的分析手段,从而推动相关领域的技术进步。展开更多
To determine the root cause of a bare-spot defect in a hot-dip galvanized boron-added steel sheet,we performed metallurgical characterizations using time-of-flight secondary ion mass spectrometry(ToF-SIMS)in addition ...To determine the root cause of a bare-spot defect in a hot-dip galvanized boron-added steel sheet,we performed metallurgical characterizations using time-of-flight secondary ion mass spectrometry(ToF-SIMS)in addition to glow discharge optical emission spectrometry,field-emission scanning electron microscopy(FE-SEM),and energy dispersive spectroscopy.Mn and B enrichments on the steel surface in the bare-spot area were detected through various methods.FE-SEM revealed external oxide nodules and zinc droplets,which indicated poor wettability.ToF-SIMS further revealed considerably more detailed lateral and depth distributions of Mn,B,and Al.The formation of external Mn-B compound oxides on the steel surface prior to hot dipping,which substantially deteriorated the wettability and prevented the formation of a Fe_(2)Al_(5)inhibition layer,resulted in the formation of a bare-spot defect.ToF-SIMS mapping of Al ion proved that a slight reaction still occurred between the dissolved Al in the molten zinc bath and steel substrate,although no evident Fe_(2)Al_(5)inhibition layer formed in the bare-spot area.展开更多
In this paper, surface of gold impregnated with thiophene was studied by the Time of Flight secondary Ion Mass Spectrometry ( TOF-SIMS). Some characterizations of gold-sulfur cluster ions of structures and chemical qu...In this paper, surface of gold impregnated with thiophene was studied by the Time of Flight secondary Ion Mass Spectrometry ( TOF-SIMS). Some characterizations of gold-sulfur cluster ions of structures and chemical qualities are obtained.展开更多
Using the Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS), the interface interaction between ethyl mercaptan and gold is observed. A series of gold-sulfur cluster ions are shown on the mass spectrum, which d...Using the Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS), the interface interaction between ethyl mercaptan and gold is observed. A series of gold-sulfur cluster ions are shown on the mass spectrum, which demonstrate the Self-Assembled Monolayers (SAMs) between mercaptan and gold展开更多
: The TOF-SIMS fragment peak ascription of organic and inorganic ions of mineral-bituminous groundmass of Jurassic source rocks in the Turpan-Hami and Junggar basins was studied by using the high-resolution Time of Fl...: The TOF-SIMS fragment peak ascription of organic and inorganic ions of mineral-bituminous groundmass of Jurassic source rocks in the Turpan-Hami and Junggar basins was studied by using the high-resolution Time of Flight Secondary Ion Mass Spectrometer (TOF-SIMS). The characteristics of spectrum distribution and constitution of fragment ions of the mineral-bituminous groundmass are discussed; then the methods of evaluating its hydrocarbon-generating potential are developed. In addition, the typical parameters, XAL, Yox and ZAR, for indicating the hydrocarbon-generating potential of mineral-bituminous and other organic matter in source rocks are put forward to reflect the aliphatic, oxygenous, and aromatic structures. It is confirmed by Rock-Eval that these parameters are significant in evaluating hydrocarbon generation. Moreover, the detection of the nitrogenous and oxygenous fragment ion, CH5NO3+, in the mudstone formed in semi-deep lakes and in the carbargilite formed in the arms of lakes reflects the fact that microbes take an active part in biologic degradation.展开更多
The size distribution and molecular structure of water clusters play a critical role in the chemical,biological and atmospheric process.The common experimental study of water clusters in aqueous solution is challenged...The size distribution and molecular structure of water clusters play a critical role in the chemical,biological and atmospheric process.The common experimental study of water clusters in aqueous solution is challenged due to the influence of local H-bonding environments on vibration spectroscopies or vacuum requirements for most mass spectrometry technologies.Here,the time-of-flight secondary ion mass spectrometry（To F-SIMS）combining with a microfluidic chip has been applied to achieve the in-situ discrimination of the size distribution for water clusters in liquid water at room temperature.The results demonstrated that the presented method is highly system stable,reproducible and accurate.The comparison of heavy water with pure water was made to further demonstrate the accuracy of this technique.These results showed that（H2O）3H-＋ and （D2O）4D-＋ are the most dominant clusters in pure and heavy water,respectively.This one water molecule difference in the dominant cluster size may due to the nuclear quantum effects on water’s hydrogen bonded network.It is the first time to experimentally show the size distribution of water clusters over a wide range（n=1–30）for pure展开更多
文摘飞行时间二次离子质谱(time-of-flight secondary ion mass spectrometry,TOF-SIMS)作为一种高灵敏度、高分辨率的表面分析技术,在材料科学领域应用广泛。聚焦于TOF-SIMS在钢铁材料分析中的应用,探讨了其在薄膜/钝化膜分析、微量元素残留、晶界富集、表面基团表征及氢元素分析等方面的潜力。凭借高空间分辨率和卓越的化学灵敏度,TOF-SIMS能提供高精度的表面成分分布、深度剖析与三维成像结果,有效克服了能量色散X射线光谱(EDS)等传统分析方法在灵敏度与元素检测范围上的局限性。通过镀锡板黄斑缺陷、ZM镀层钢板残油及BW600钢晶界元素富集等案例,展示了该技术的实际应用。特别是在氢脆研究中,TOF-SIMS能够高效、精确地表征氢在材料中的分布,为揭示氢脆机理提供了独特优势。综上,TOF-SIMS技术在钢铁材料缺陷分析中具有广阔的应用前景,可为钢铁行业提供精准的分析手段,从而推动相关领域的技术进步。
文摘To determine the root cause of a bare-spot defect in a hot-dip galvanized boron-added steel sheet,we performed metallurgical characterizations using time-of-flight secondary ion mass spectrometry(ToF-SIMS)in addition to glow discharge optical emission spectrometry,field-emission scanning electron microscopy(FE-SEM),and energy dispersive spectroscopy.Mn and B enrichments on the steel surface in the bare-spot area were detected through various methods.FE-SEM revealed external oxide nodules and zinc droplets,which indicated poor wettability.ToF-SIMS further revealed considerably more detailed lateral and depth distributions of Mn,B,and Al.The formation of external Mn-B compound oxides on the steel surface prior to hot dipping,which substantially deteriorated the wettability and prevented the formation of a Fe_(2)Al_(5)inhibition layer,resulted in the formation of a bare-spot defect.ToF-SIMS mapping of Al ion proved that a slight reaction still occurred between the dissolved Al in the molten zinc bath and steel substrate,although no evident Fe_(2)Al_(5)inhibition layer formed in the bare-spot area.
文摘In this paper, surface of gold impregnated with thiophene was studied by the Time of Flight secondary Ion Mass Spectrometry ( TOF-SIMS). Some characterizations of gold-sulfur cluster ions of structures and chemical qualities are obtained.
文摘Using the Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS), the interface interaction between ethyl mercaptan and gold is observed. A series of gold-sulfur cluster ions are shown on the mass spectrum, which demonstrate the Self-Assembled Monolayers (SAMs) between mercaptan and gold
文摘: The TOF-SIMS fragment peak ascription of organic and inorganic ions of mineral-bituminous groundmass of Jurassic source rocks in the Turpan-Hami and Junggar basins was studied by using the high-resolution Time of Flight Secondary Ion Mass Spectrometer (TOF-SIMS). The characteristics of spectrum distribution and constitution of fragment ions of the mineral-bituminous groundmass are discussed; then the methods of evaluating its hydrocarbon-generating potential are developed. In addition, the typical parameters, XAL, Yox and ZAR, for indicating the hydrocarbon-generating potential of mineral-bituminous and other organic matter in source rocks are put forward to reflect the aliphatic, oxygenous, and aromatic structures. It is confirmed by Rock-Eval that these parameters are significant in evaluating hydrocarbon generation. Moreover, the detection of the nitrogenous and oxygenous fragment ion, CH5NO3+, in the mudstone formed in semi-deep lakes and in the carbargilite formed in the arms of lakes reflects the fact that microbes take an active part in biologic degradation.
基金supported by the National Natural Science Foundation of China (21421004, 21705046)Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02E00023)+2 种基金the Programme of Introducing Talents of Discipline to Universities (B16017)the Program of Shanghai Subject Chief Scientist (15XD1501200)the Fundamental Research Funds for the Central Universities (222201718001, 222201717003, 222201714012)
文摘The size distribution and molecular structure of water clusters play a critical role in the chemical,biological and atmospheric process.The common experimental study of water clusters in aqueous solution is challenged due to the influence of local H-bonding environments on vibration spectroscopies or vacuum requirements for most mass spectrometry technologies.Here,the time-of-flight secondary ion mass spectrometry（To F-SIMS）combining with a microfluidic chip has been applied to achieve the in-situ discrimination of the size distribution for water clusters in liquid water at room temperature.The results demonstrated that the presented method is highly system stable,reproducible and accurate.The comparison of heavy water with pure water was made to further demonstrate the accuracy of this technique.These results showed that（H2O）3H-＋ and （D2O）4D-＋ are the most dominant clusters in pure and heavy water,respectively.This one water molecule difference in the dominant cluster size may due to the nuclear quantum effects on water’s hydrogen bonded network.It is the first time to experimentally show the size distribution of water clusters over a wide range（n=1–30）for pure
