炭素ナノチューブのリアルタイム振動

Arthur W Barnard^1,2,3, Mian Zhang^1,4,5, Gustavo S Wiederhecker^4,6

¹School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA.

Nature

|January 22, 2019

まとめ

研究者はカーボンナノチューブ共振器の熱振動をリアルタイムで直接測定しましたこれは新しい非線形ダイナミクスを明らかにし,より長い室温相関性を示し,非線形機械システムの研究への扉を開きました.

科学分野:

ナノテクノロジーとメカニカルオシレータ
量子力学と信号処理

背景:

ミニチュアメカニカルオシレータは信号処理と量子力学にとって不可欠です
分子スケールでは,炭素ナノチューブ共鳴器は,熱の変動により複雑で非線形なダイナミクスを示します.
これらのナノスケールメカニズムを研究する上でリアルタイムの運動検出は重要な制限となっています

研究の目的:

炭素ナノチューブの熱振動をリアルタイムで直接測定します
ナノスケール共鳴器の未発見の非線形ダイナミクスを研究する.
炭素ナノチューブシステムにおける室温相関性を調査する.

主な方法:

敏感な光子顕微鏡として高精度ナトリウム光学腔を使用した.
高位移転感 (700 fm Hz^-1/2) と優れた時間解像度を達成した.
炭素ナノチューブの熱振動をリアルタイムで測定した.

主要な成果:

ダイナミクスの新たな領域を発見しました
観測された室温コヘランスは報告より3度長い.
長期にわたる非均衡のダイナミクスと弱々しく混沌とした機械的な呼吸器を特定した.
数値モデルを使って観測された動態を成功裏に再現した.

結論:

このテクニックは,ブラウン限界における非線形機械システムの研究を可能にします.
この発見は熱変動によるメカニズムを理解するための新たな道を開きます
炭素ナノチューブ共鳴器のための統合された,敏感な,高帯域幅のナノフォトニックインターフェースを提示した.

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