Shape restoration effect in Ag-SiO2 core-shell nanowires

Sergei Vlassov; Boris Polyakov; Leonid M. Dorogin; Mikk Vahtrus; Magnus Mets; Mikk Antsov; Rando Saar; Alexey E. Romanov; Ants Lõhmus; Rünno Lõhmus

doi:10.1021/nl5019063

Shape restoration effect in Ag-SiO2 core-shell nanowires

Sergei Vlassov^*
, Boris Polyakov
, Leonid M. Dorogin
, Mikk Vahtrus
, Magnus Mets
, Mikk Antsov
, Rando Saar
, Alexey E. Romanov
, Ants Lõhmus
, Rünno Lõhmus

^*Corresponding author for this work

Thin Films Laboratory, Institute of Solid State Physics

University of Latvia
University of Tartu
Estonian Nanotechnology Competence Centre
St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)
Ioffe Physico-Technical Institute

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

The combination of two different materials in a single composite core-shell heterostructure can lead to improved or even completely novel properties. In this work we demonstrate the enhancement of the mechanical properties of silver (Ag) nanowires (NW) achieved by coating them with a silica (SiO₂) shell. In situ scanning electron microscope (SEM) nanomechanical tests of Ag-SiO₂ core-shell nanowires reveal an improved fracture resistance and an electron-beam induced shape restoration effect. In addition, control experiments are conducted separately on uncoated Ag NWs and on empty SiO₂ shells in order to gain deeper insight into the peculiar properties of Ag-SiO₂. Test conditions are simulated using finite-element methods; possible mechanisms responsible for the shape restoration and the enhanced fracture resistance are discussed.

Original language	English
Pages (from-to)	5201-5205
Number of pages	5
Journal	Nano Letters
Volume	14
Issue number	9
DOIs	https://doi.org/10.1021/nl5019063
Publication status	Published - 10 Sept 2014

OECD Field of Science

1.3 Physical Sciences

Keywords

Core-shell nanowires
electron beam
mechanical properties
scanning electron microscopy
shape restoration

Access to Document

10.1021/nl5019063

Cite this

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title = "Shape restoration effect in Ag-SiO2 core-shell nanowires",

abstract = "The combination of two different materials in a single composite core-shell heterostructure can lead to improved or even completely novel properties. In this work we demonstrate the enhancement of the mechanical properties of silver (Ag) nanowires (NW) achieved by coating them with a silica (SiO2) shell. In situ scanning electron microscope (SEM) nanomechanical tests of Ag-SiO2 core-shell nanowires reveal an improved fracture resistance and an electron-beam induced shape restoration effect. In addition, control experiments are conducted separately on uncoated Ag NWs and on empty SiO2 shells in order to gain deeper insight into the peculiar properties of Ag-SiO2. Test conditions are simulated using finite-element methods; possible mechanisms responsible for the shape restoration and the enhanced fracture resistance are discussed.",

keywords = "Core-shell nanowires, electron beam, mechanical properties, scanning electron microscopy, shape restoration",

author = "Sergei Vlassov and Boris Polyakov and Dorogin, \{Leonid M.\} and Mikk Vahtrus and Magnus Mets and Mikk Antsov and Rando Saar and Romanov, \{Alexey E.\} and Ants L{\~o}hmus and R{\"u}nno L{\~o}hmus",

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month = sep,

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doi = "10.1021/nl5019063",

language = "English",

volume = "14",

pages = "5201--5205",

journal = "Nano Letters",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Shape restoration effect in Ag-SiO2 core-shell nanowires

AU - Vlassov, Sergei

AU - Polyakov, Boris

AU - Dorogin, Leonid M.

AU - Vahtrus, Mikk

AU - Mets, Magnus

AU - Antsov, Mikk

AU - Saar, Rando

AU - Romanov, Alexey E.

AU - Lõhmus, Ants

AU - Lõhmus, Rünno

PY - 2014/9/10

Y1 - 2014/9/10

N2 - The combination of two different materials in a single composite core-shell heterostructure can lead to improved or even completely novel properties. In this work we demonstrate the enhancement of the mechanical properties of silver (Ag) nanowires (NW) achieved by coating them with a silica (SiO2) shell. In situ scanning electron microscope (SEM) nanomechanical tests of Ag-SiO2 core-shell nanowires reveal an improved fracture resistance and an electron-beam induced shape restoration effect. In addition, control experiments are conducted separately on uncoated Ag NWs and on empty SiO2 shells in order to gain deeper insight into the peculiar properties of Ag-SiO2. Test conditions are simulated using finite-element methods; possible mechanisms responsible for the shape restoration and the enhanced fracture resistance are discussed.

AB - The combination of two different materials in a single composite core-shell heterostructure can lead to improved or even completely novel properties. In this work we demonstrate the enhancement of the mechanical properties of silver (Ag) nanowires (NW) achieved by coating them with a silica (SiO2) shell. In situ scanning electron microscope (SEM) nanomechanical tests of Ag-SiO2 core-shell nanowires reveal an improved fracture resistance and an electron-beam induced shape restoration effect. In addition, control experiments are conducted separately on uncoated Ag NWs and on empty SiO2 shells in order to gain deeper insight into the peculiar properties of Ag-SiO2. Test conditions are simulated using finite-element methods; possible mechanisms responsible for the shape restoration and the enhanced fracture resistance are discussed.

KW - Core-shell nanowires

KW - electron beam

KW - mechanical properties

KW - scanning electron microscopy

KW - shape restoration

UR - https://www.scopus.com/pages/publications/84914148308

U2 - 10.1021/nl5019063

DO - 10.1021/nl5019063

M3 - Article

AN - SCOPUS:84914148308

SN - 1530-6984

VL - 14

SP - 5201

EP - 5205

JO - Nano Letters

JF - Nano Letters

IS - 9

ER -

Shape restoration effect in Ag-SiO2 core-shell nanowires

Abstract

OECD Field of Science

Keywords

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