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Superhydrophobic Alkanethiol-Coated Microsubmarines for Effective Removal of Oil

Guix, Maria and Orozco, Jahir and García, Miguel and Gao, Wei and Sattayasamitsathit, Sirilak and Merkoçi, Arben and Escarpa, Alberto and Wang, Joseph (2012) Superhydrophobic Alkanethiol-Coated Microsubmarines for Effective Removal of Oil. ACS Nano, 6 (5). pp. 4445-4451. ISSN 1936-0851 . http://resolver.caltech.edu/CaltechAUTHORS:20180124-143806030

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Abstract

We demonstrate the use of artificial nanomachines for effective interaction, capture, transport, and removal of oil droplets. The simple nanomachine-enabled oil collection method is based on modifying microtube engines with a superhydrophobic layer able to adsorb oil by means of its strong adhesion to a long chain of self-assembled monolayers (SAMs) of alkanethiols created on the rough gold outer surface of the device. The resultant SAM-coated Au/Ni/PEDOT/Pt microsubmarine displays continuous interaction with large oil droplets and is capable of loading and transporting multiple small oil droplets. The influence of the alkanethiol chain length, polarity, and head functional group and hence of the surface hydrophobicity upon the oil–nanomotor interaction and the propulsion is examined. No such oil–motor interactions were observed in control experiments involving both unmodified microengines and microengines coated with SAM layers containing a polar terminal group. These results demonstrate that such SAM-Au/Ni/PEDOT/Pt micromachines can be useful for a facile, rapid, and efficient collection of oils in water samples, which can be potentially exploited for other water–oil separation systems. The integration of oil-sorption properties into self-propelled microengines holds great promise for the remediation of oil-contaminated water samples and for the isolation of other hydrophobic targets, such as drugs.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/nn301175bDOIArticle
http://pubs.acs.org/doi/abs/10.1021/nn301175bPublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/nn301175bPublisherSupporting Information
Additional Information:© 2012 American Chemical Society. Received 16 March 2012. Date accepted 5 April 2012. Published online 5 April 2012. Published in print 22 May 2012. This work was supported by the National Science Foundation (NSF Award Number CBET 0853375) and NATO Science for Peace and Security Program (SfP 983807). M. Guix acknowledges the support from Spanish MICINN. J. Orozco and M. García are thankful for funding from a Beatriu de Pinós postdoctoral fellowship (Government of Catalonia) and University of Alcalá (Madrid), respectively. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
NSFCBET-0853375
North Atlantic Treaty Organization (NATO)SfP 983807
Ministerio de Ciencia e Innovación (MCINN)UNSPECIFIED
Beatriu de Pinós (Catalonia)UNSPECIFIED
University of AlcaláUNSPECIFIED
Record Number:CaltechAUTHORS:20180124-143806030
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180124-143806030
Official Citation:Superhydrophobic Alkanethiol-Coated Microsubmarines for Effective Removal of Oil Maria Guix, Jahir Orozco, Miguel García, Wei Gao, Sirilak Sattayasamitsathit, Arben Merkoçi, Alberto Escarpa, and Joseph Wang ACS Nano 2012 6 (5), 4445-4451 DOI: 10.1021/nn301175b
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84507
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:31 Jan 2018 22:26
Last Modified:31 Jan 2018 22:26

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