Propulsion and controlled steering of magnetic nanohelices

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Propulsion and controlled steering of magnetic nanohelices. / Alcanzare, Maria Michiko; Karttunen, Mikko; Ala-Nissila, Tapio.

In: Soft Matter, Vol. 15, No. 7, 01.01.2019, p. 1684-1691.

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Alcanzare, Maria Michiko ; Karttunen, Mikko ; Ala-Nissila, Tapio. / Propulsion and controlled steering of magnetic nanohelices. In: Soft Matter. 2019 ; Vol. 15, No. 7. pp. 1684-1691.

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@article{7a6fcc42767d4013945b7ed32c733df5,
title = "Propulsion and controlled steering of magnetic nanohelices",
abstract = "Externally controlled motion of micro and nanomotors in a fluid environment constitutes a promising tool in biosensing, targeted delivery and environmental remediation. In particular, recent experiments have demonstrated that fuel-free propulsion can be achieved through the application of external magnetic fields on magnetic helically shaped structures. The magnetic interaction between helices and the rotating field induces a torque that rotates and propels them via the coupled rotational-translational motion. Recent works have shown that there exist certain optimal geometries of helical shapes for propulsion. However, experiments show that controlled motion remains a challenge at the nanoscale due to Brownian motion that interferes with the deterministic motion and makes it difficult to achieve controlled steering. In the present work we employ quantitatively accurate simulation methodology to design a setup for which magnetic nanohelices of 30 nm in radius and 180 nm in length (corresponding to previously determined optimal length to radius ratio of 6), with and without cargo, can be accurately propelled and steered in the presence of thermal fluctuations. In particular, we demonstrate fast transport of such nanomotors and devise protocols in manipulating external fields to achieve directionally controlled steering at biologically relevant temperatures.",
author = "Alcanzare, {Maria Michiko} and Mikko Karttunen and Tapio Ala-Nissila",
year = "2019",
month = "1",
day = "1",
doi = "10.1039/c8sm00037a",
language = "English",
volume = "15",
pages = "1684--1691",
journal = "Soft Matter",
issn = "1744-683X",
number = "7",

}

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TY - JOUR

T1 - Propulsion and controlled steering of magnetic nanohelices

AU - Alcanzare, Maria Michiko

AU - Karttunen, Mikko

AU - Ala-Nissila, Tapio

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Externally controlled motion of micro and nanomotors in a fluid environment constitutes a promising tool in biosensing, targeted delivery and environmental remediation. In particular, recent experiments have demonstrated that fuel-free propulsion can be achieved through the application of external magnetic fields on magnetic helically shaped structures. The magnetic interaction between helices and the rotating field induces a torque that rotates and propels them via the coupled rotational-translational motion. Recent works have shown that there exist certain optimal geometries of helical shapes for propulsion. However, experiments show that controlled motion remains a challenge at the nanoscale due to Brownian motion that interferes with the deterministic motion and makes it difficult to achieve controlled steering. In the present work we employ quantitatively accurate simulation methodology to design a setup for which magnetic nanohelices of 30 nm in radius and 180 nm in length (corresponding to previously determined optimal length to radius ratio of 6), with and without cargo, can be accurately propelled and steered in the presence of thermal fluctuations. In particular, we demonstrate fast transport of such nanomotors and devise protocols in manipulating external fields to achieve directionally controlled steering at biologically relevant temperatures.

AB - Externally controlled motion of micro and nanomotors in a fluid environment constitutes a promising tool in biosensing, targeted delivery and environmental remediation. In particular, recent experiments have demonstrated that fuel-free propulsion can be achieved through the application of external magnetic fields on magnetic helically shaped structures. The magnetic interaction between helices and the rotating field induces a torque that rotates and propels them via the coupled rotational-translational motion. Recent works have shown that there exist certain optimal geometries of helical shapes for propulsion. However, experiments show that controlled motion remains a challenge at the nanoscale due to Brownian motion that interferes with the deterministic motion and makes it difficult to achieve controlled steering. In the present work we employ quantitatively accurate simulation methodology to design a setup for which magnetic nanohelices of 30 nm in radius and 180 nm in length (corresponding to previously determined optimal length to radius ratio of 6), with and without cargo, can be accurately propelled and steered in the presence of thermal fluctuations. In particular, we demonstrate fast transport of such nanomotors and devise protocols in manipulating external fields to achieve directionally controlled steering at biologically relevant temperatures.

UR - http://www.scopus.com/inward/record.url?scp=85061476149&partnerID=8YFLogxK

U2 - 10.1039/c8sm00037a

DO - 10.1039/c8sm00037a

M3 - Article

VL - 15

SP - 1684

EP - 1691

JO - Soft Matter

JF - Soft Matter

SN - 1744-683X

IS - 7

ER -

ID: 32267820