Low-Temperature Synthesis of Weakly Confined Carbyne Inside Single-Walled Carbon Nanotubes

被引：2

作者：

Zhang, Bo-Wen ^{[1
]}

Qiu, Xi-Yang ^{[1
]}

Ma, Yicheng ^{[2
]}

Hu, Qingmei ^{[1
]}

Fito-Parera, Aina ^{[3
,4
]}

Kohata, Ikuma ^{[1
]}

Feng, Ya ^{[5
]}

Zheng, Yongjia ^{[2
]}

Zhang, Chiyu ^{[6
]}

Matsuo, Yutaka ^{[7
,8
]}

Wang, Yuhuang ^{[9
,10
]}

Chiashi, Shohei ^{[1
]}

Otsuka, Keigo ^{[1
]}

Xiang, Rong ^{[2
]}

Levshov, Dmitry I. ^{[3
,4
]}

Cambre, Sofie ^{[3
,4
]}

Wenseleers, Wim ^{[11
]}

Rotkin, Slava V. ^{[12
]}

Maruyama, Shigeo ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Mech Engn, Tokyo 1138656, Japan

[2] Zhejiang Univ, Sch Mech Engn, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Peoples R China

[3] Univ Antwerp, Dept Chem, Theory & Spect Mol & Mat, B-2610 Antwerp, Belgium

[4] Univ Antwerp, Dept Phys, Theory & Spect Mol & Mat, B-2610 Antwerp, Belgium

[5] Dalian Univ Technol, Sch Energy & Power Engn, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Liaoning, Peoples R China

[6] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[7] Nagoya Univ, Grad Sch Engn, Dept Chem Syst Engn, Nagoya 4648603, Japan

[8] Nagoya Univ, Inst Mat Innovat, Inst Future Soc, Nagoya 4648603, Japan

[9] Univ Maryland, Dept Chem & Biochem, Chem Phys Program, College Pk, MD 20742 USA

[10] Univ Maryland, Maryland Nano Ctr, College Pk, MD 20742 USA

[11] Univ Antwerp, Dept Phys, Nanostruct & Organ Opt & Elect Mat, B-2610 Antwerp, Belgium

[12] Penn State Univ, Dept Engn Sci & Mech, Mat Res Inst, University Pk, PA 16802 USA

来源：

ACS NANO | 2025年 / 19卷 / 13期

基金：

日本学术振兴会;

关键词：

carbyne; confinedcarbyne; single-walled carbonnanotubes; surfactant; Raman spectroscopy; RAMAN-SPECTROSCOPY; POLYYNES; CHAINS; TRANSITION; ALLOTROPE; EVOLUTION; TRANSPORT; GROWTH;

D O I：

10.1021/acsnano.4c17104

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Carbyne, a one-dimensional (1D) carbon allotrope with alternating triple and single bonds, has the highest known mechanical strength but is unstable to bending, limiting its synthesis to short linear chains. Encapsulation within carbon nanotubes (CNTs) stabilizes carbyne, forming confined carbyne (CC), thus enabling further research concerning attractive 1D physics and materials properties of carbyne. While CC has been synthesized in multi-walled CNTs using the arc-discharge method and in double-walled CNTs via the high-temperature high-vacuum method, synthesis in single-walled CNTs (SWCNTs) has been challenging due to their fragility under such conditions. In this work, we report a low-temperature method to synthesize CC inside SWCNTs (CC@SWCNT). By annealing SWCNTs containing ammonium deoxycholate (ADC) at 400 degrees C, ADC is converted into CC without damaging the SWCNTs. Raman spectroscopy revealed a strong CC phonon peak (CC-mode) at 1860-1870 cm(-1), much stronger than the SWCNT G-band peak, confirming a high fraction of CC in the resulting material. The Raman mapping result showed the uniformity of the CC-mode signal across the entire film sample, proving the high efficiency of this method in synthesizing CC in every SWCNT of the appropriate size. Notably, the CC-mode peaks of CC@SWCNT (above 1860 cm(-1)) are higher than those reported in previous CC@CNT samples (mostly <1856 cm(-1)). This is attributed to larger SWCNT diameters (>0.95 nm) used in this study, compared to the typical 0.6-0.8 nm range. Larger diameters result in reduced confinement, allowing carbyne to closely resemble free-standing carbyne while remaining stabilized. This low-temperature synthesis of long-chain, nearly free-standing carbyne within large-diameter SWCNTs offers opportunities for exploring 1D physics and properties of carbyne for potential applications.

引用

页码：12996 / 13006

页数：11

共 65 条

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