Mass spectrometric study of the negative and positive secondary ions emitted from ethanol microdroplets by MeV-energy heavy ion impact

Kitajima, Kazutomo; Majima, T.; Nishio, T; Oonishi, Yoshiki; Mizutani, S.; Kohno, Jun; Saito, Manabu; Tsuchida, H.

doi:10.1016/j.nimb.2018.03.029

Cited by 7 publications

(29 citation statements)

References 47 publications

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“…Our experimental setup has been reported previously in detail. , Briefly, microdroplets of methanol were generated by ultrasonic atomization from liquid methanol CH 3 OH (99.8% purity, Nacalai Tesque, Inc., Japan) and methanol- d CH 3 OD (99.0 atom % D, Acros Organics, Belgium) samples. The diameter of the droplets in a collision area was mainly from several hundred nanometers to a few micrometers.…”

Section: Methodsmentioning

confidence: 99%

“…In a previous study for ethanol droplets, we observed hydrocarbon anions such as C 3 − , C 3 H − , C 3 H 2 − , C 4 − , and C 4 H − . 24 They are considered to be produced by chemical reactions associated with a nanoplasma state in a heavy ion track. 43…”

Section: Negative Fragment Ionsmentioning

confidence: 99%

“…In experiments using ice targets, particular care is required to avoid impurities of absorbed residual gas and reactions that pertain to the accumulated products on the ice surface when considering the elementary reaction processes. Recently, we developed an alternative experimental system that enables a mass spectrometric study of secondary ions emitted from microdroplet surfaces by fast ion impacts under high vacuum. , This method eliminates the aforementioned problems because the product ions always originate from the new fresh surface of the droplets. Furthermore, the secondary ions are considered to be emitted on a sub-nanosecond time scale .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we developed an alternative experimental system that enables a mass spectrometric study of secondary ions emitted from microdroplet surfaces by fast ion impacts under high vacuum. 23,24 This method eliminates the aforementioned problems because the product ions always originate from the new fresh surface of the droplets. Furthermore, the secondary ions are considered to be emitted on a sub-nanosecond time scale.…”

Section: Introductionmentioning

confidence: 99%

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Fast Heavy-Ion-Induced Anion–Molecule Reactions on the Methanol Droplet Surface

et al. 2022

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To gain insight into complex ion−molecule reactions induced by MeV-energy heavy ion irradiation of condensed matter, we performed a mass spectrometric study of secondary ions emitted from methanol microdroplet surfaces by 2.0 MeV C 2+ . We observed positive and negative secondary ions, including fragments, clusters, and reaction products. We found that a wider variety of negative ions than positive ions (such as C 2 H − , C 2 HO − , C 2 H 5 O − , and C 2 H 3 O 2 − ) were formed. We performed measurements for deuterated methanol (CH 3 OD) droplets to identify the hydrogen elimination site of the intermediates involved in the reactions and to reveal the mechanism that generates various negative reaction product ions. Comparing the results of CH 3 OD with CH 3 OH droplets, we propose that the primary formation mechanism is association reactions of anion and neutral fragments, such as CH 3 O − + CO → C 2 H 3 O 2 − . Quantum chemical calculations confirmed that the reactions can proceed with no barrier. This study provides new insights into the importance of rapid anion−molecule reactions among fragments as the mechanism that generates complex molecular species in fast heavy-ion-induced reactions.

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Section: Methodsmentioning

confidence: 99%

Section: Negative Fragment Ionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast Heavy-Ion-Induced Anion–Molecule Reactions on the Methanol Droplet Surface

et al. 2022

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“…Previously, negative ion formation has been reported upon interaction of liquid ethanol with energetic ions like He + , C 3+ and electrons, where O À , OH À , and C 2 H 5 O À anions were the major fragments. [28][29][30] Upon interaction with ultraintense (5 Â 10 19 W cm À2 , 40 fs) laser pulses with a spray of liquid ethanol, negative ions such as O À and C À were produced. 31 Karras et al also reported on the generation of negative ions in CH 3 I clusters at a laser intensity of B10 12 -10 13 W cm À2 .…”

Section: Detection Of Negative Ions In the Laser Ionisation Of Ethano...mentioning

confidence: 99%