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Nanomaterials
Volume 13
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10.3390/nano13010063
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Article

Effects of High-Quality Carbon Nanowalls Ionization-Assisting Substrates on Surface-Assisted Laser Desorption/Ionization Mass Spectrometry Performance

by
Ryusei Sakai
1,
Hiroki Kondo
2,
Kenji Ishikawa
2,*,
Takayuki Ohta
3,
Mineo Hiramatsu
3,
Hiromasa Tanaka
2 and
Masaru Hori
2
1
Department of Electronics, Graduate School of Engineering, Nagoya University, Furo, Chikusa, Nagoya 464-8603, Japan
2
Center for Low-Temperature Plasma Sciences, Nagoya University, Furo, Chikusa, Nagoya 464-8603, Japan
3
Department of Electrical and Electronic Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku, Nagoya 468-8502, Japan
*
Author to whom correspondence should be addressed.
Nanomaterials 2023, 13(1), 63; https://doi.org/10.3390/nano13010063
Submission received: 25 November 2022 / Revised: 16 December 2022 / Accepted: 21 December 2022 / Published: 23 December 2022
(This article belongs to the Special Issue Recent Advances in Nanocarbon Derivatives: From Synthesis to Application)
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Abstract

Surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) is performed using carbon nanowalls (CNWs) for ionization-assisting substrates. The CNWs (referred to as high-quality CNWs) in the present study were grown using a radical-injection plasma-enhanced chemical vapor deposition (RI-PECVD) system with the addition of oxygen in a mixture of CH4 and H2 gases. High-quality CNWs were different with respect to crystallinity and C–OH groups, while showing similar wall-to-wall distances and a wettability comparable to CNWs (referred to as normal CNWs) grown without O2. The efficiency of SALDI was tested with both parameters of ion intensity and fragmental efficiency (survival yield (SY)) using N-benzylpyridinuim chloride (N-BP-CI). At a laser fluence of 4 mJ/cm2, normal CNWs had an SY of 0.97 and an ion intensity of 0.13, while 5-sccm-O2– high-quality CNWs had an SY of 0.89 and an ion intensity of 2.55. As a result, the sensitivity for the detection of low-molecular-weight analytes was improved with the high-quality CNWs compared to the normal CNWs, while an SY of 0.89 was maintained at a low laser fluence of 4 mJ/cm2. SALDI-MS measurements available with the high-quality CNWs ionization-assisting substrate provided high ionization and SY values.
Keywords: carbon nanowalls; surface-assisted laser desorption/ionization mass spectrometry; plasma-enhanced chemical vapor deposition carbon nanowalls; surface-assisted laser desorption/ionization mass spectrometry; plasma-enhanced chemical vapor deposition

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MDPI and ACS Style

Sakai, R.; Kondo, H.; Ishikawa, K.; Ohta, T.; Hiramatsu, M.; Tanaka, H.; Hori, M. Effects of High-Quality Carbon Nanowalls Ionization-Assisting Substrates on Surface-Assisted Laser Desorption/Ionization Mass Spectrometry Performance. Nanomaterials 2023, 13, 63. https://doi.org/10.3390/nano13010063

AMA Style

Sakai R, Kondo H, Ishikawa K, Ohta T, Hiramatsu M, Tanaka H, Hori M. Effects of High-Quality Carbon Nanowalls Ionization-Assisting Substrates on Surface-Assisted Laser Desorption/Ionization Mass Spectrometry Performance. Nanomaterials. 2023; 13(1):63. https://doi.org/10.3390/nano13010063

Chicago/Turabian Style

Sakai, Ryusei, Hiroki Kondo, Kenji Ishikawa, Takayuki Ohta, Mineo Hiramatsu, Hiromasa Tanaka, and Masaru Hori. 2023. "Effects of High-Quality Carbon Nanowalls Ionization-Assisting Substrates on Surface-Assisted Laser Desorption/Ionization Mass Spectrometry Performance" Nanomaterials 13, no. 1: 63. https://doi.org/10.3390/nano13010063

APA Style

Sakai, R., Kondo, H., Ishikawa, K., Ohta, T., Hiramatsu, M., Tanaka, H., & Hori, M. (2023). Effects of High-Quality Carbon Nanowalls Ionization-Assisting Substrates on Surface-Assisted Laser Desorption/Ionization Mass Spectrometry Performance. Nanomaterials, 13(1), 63. https://doi.org/10.3390/nano13010063

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