Scalable fabrication of nanopores in membranes

Via thermal annealing of Au nanoparticles

Taeyoung Park, Sang Jun Lee, Jong Hwan Cha, Wonjoon Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nanopores are promising candidates for versatile sensing of micro- and nanomaterials. However, the fabrication of isolated nanopores with optimal dimensions and distributions requires complex processes that involve the use of high-cost equipment. Herein, we report a scalable fabrication of isolated conical nanopores with adjustable dimensions and distribution densities on a Si3N4 membrane via thermal annealing of Au nanoparticles (AuNPs). The AuNP-dispersed solution was dropped and evaporated on the membrane, while the pH value and concentration of AuNPs controlled the zeta potential difference and the distribution density of the attached AuNPs. The optimized thermal annealing directly fabricated conical nanopores at the positions of the AuNPs because of the quasi-liquid state of the AuNPs and their interaction with the Si3N4 lattices. The 50, 100, and 200 nm AuNPs enabled one-step fabrication of 8-, 26-, and 63 nm nanopores, while the inter-distances and distribution densities were controllable over the membrane. The physicochemical analyses elucidated the underlying mechanisms of direct nanopore formation, and the precise adjustment of thermal annealing developed three unique nanopores that differently interacted with the AuNPs: (1) Au-residue-embedded nanopores, (2) isolated nanopores, and (3) nanopores with the remaining Au droplet. The AuNPs-driven fabrication of versatile nanopore membranes enables new applications for sensing and transporting small-scale materials.

Original languageEnglish
Pages (from-to)22623-22634
Number of pages12
JournalNanoscale
Volume10
Issue number47
DOIs
Publication statusPublished - 2018 Dec 21

Fingerprint

Nanopores
Annealing
Nanoparticles
Membranes
Fabrication
Hot Temperature
Zeta potential
Nanostructured materials

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Scalable fabrication of nanopores in membranes : Via thermal annealing of Au nanoparticles. / Park, Taeyoung; Lee, Sang Jun; Cha, Jong Hwan; Choi, Wonjoon.

In: Nanoscale, Vol. 10, No. 47, 21.12.2018, p. 22623-22634.

Research output: Contribution to journalArticle

Park, Taeyoung ; Lee, Sang Jun ; Cha, Jong Hwan ; Choi, Wonjoon. / Scalable fabrication of nanopores in membranes : Via thermal annealing of Au nanoparticles. In: Nanoscale. 2018 ; Vol. 10, No. 47. pp. 22623-22634.
@article{82039043b790439aa93585fdd9e510ea,
title = "Scalable fabrication of nanopores in membranes: Via thermal annealing of Au nanoparticles",
abstract = "Nanopores are promising candidates for versatile sensing of micro- and nanomaterials. However, the fabrication of isolated nanopores with optimal dimensions and distributions requires complex processes that involve the use of high-cost equipment. Herein, we report a scalable fabrication of isolated conical nanopores with adjustable dimensions and distribution densities on a Si3N4 membrane via thermal annealing of Au nanoparticles (AuNPs). The AuNP-dispersed solution was dropped and evaporated on the membrane, while the pH value and concentration of AuNPs controlled the zeta potential difference and the distribution density of the attached AuNPs. The optimized thermal annealing directly fabricated conical nanopores at the positions of the AuNPs because of the quasi-liquid state of the AuNPs and their interaction with the Si3N4 lattices. The 50, 100, and 200 nm AuNPs enabled one-step fabrication of 8-, 26-, and 63 nm nanopores, while the inter-distances and distribution densities were controllable over the membrane. The physicochemical analyses elucidated the underlying mechanisms of direct nanopore formation, and the precise adjustment of thermal annealing developed three unique nanopores that differently interacted with the AuNPs: (1) Au-residue-embedded nanopores, (2) isolated nanopores, and (3) nanopores with the remaining Au droplet. The AuNPs-driven fabrication of versatile nanopore membranes enables new applications for sensing and transporting small-scale materials.",
author = "Taeyoung Park and Lee, {Sang Jun} and Cha, {Jong Hwan} and Wonjoon Choi",
year = "2018",
month = "12",
day = "21",
doi = "10.1039/c8nr06441e",
language = "English",
volume = "10",
pages = "22623--22634",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "47",

}

TY - JOUR

T1 - Scalable fabrication of nanopores in membranes

T2 - Via thermal annealing of Au nanoparticles

AU - Park, Taeyoung

AU - Lee, Sang Jun

AU - Cha, Jong Hwan

AU - Choi, Wonjoon

PY - 2018/12/21

Y1 - 2018/12/21

N2 - Nanopores are promising candidates for versatile sensing of micro- and nanomaterials. However, the fabrication of isolated nanopores with optimal dimensions and distributions requires complex processes that involve the use of high-cost equipment. Herein, we report a scalable fabrication of isolated conical nanopores with adjustable dimensions and distribution densities on a Si3N4 membrane via thermal annealing of Au nanoparticles (AuNPs). The AuNP-dispersed solution was dropped and evaporated on the membrane, while the pH value and concentration of AuNPs controlled the zeta potential difference and the distribution density of the attached AuNPs. The optimized thermal annealing directly fabricated conical nanopores at the positions of the AuNPs because of the quasi-liquid state of the AuNPs and their interaction with the Si3N4 lattices. The 50, 100, and 200 nm AuNPs enabled one-step fabrication of 8-, 26-, and 63 nm nanopores, while the inter-distances and distribution densities were controllable over the membrane. The physicochemical analyses elucidated the underlying mechanisms of direct nanopore formation, and the precise adjustment of thermal annealing developed three unique nanopores that differently interacted with the AuNPs: (1) Au-residue-embedded nanopores, (2) isolated nanopores, and (3) nanopores with the remaining Au droplet. The AuNPs-driven fabrication of versatile nanopore membranes enables new applications for sensing and transporting small-scale materials.

AB - Nanopores are promising candidates for versatile sensing of micro- and nanomaterials. However, the fabrication of isolated nanopores with optimal dimensions and distributions requires complex processes that involve the use of high-cost equipment. Herein, we report a scalable fabrication of isolated conical nanopores with adjustable dimensions and distribution densities on a Si3N4 membrane via thermal annealing of Au nanoparticles (AuNPs). The AuNP-dispersed solution was dropped and evaporated on the membrane, while the pH value and concentration of AuNPs controlled the zeta potential difference and the distribution density of the attached AuNPs. The optimized thermal annealing directly fabricated conical nanopores at the positions of the AuNPs because of the quasi-liquid state of the AuNPs and their interaction with the Si3N4 lattices. The 50, 100, and 200 nm AuNPs enabled one-step fabrication of 8-, 26-, and 63 nm nanopores, while the inter-distances and distribution densities were controllable over the membrane. The physicochemical analyses elucidated the underlying mechanisms of direct nanopore formation, and the precise adjustment of thermal annealing developed three unique nanopores that differently interacted with the AuNPs: (1) Au-residue-embedded nanopores, (2) isolated nanopores, and (3) nanopores with the remaining Au droplet. The AuNPs-driven fabrication of versatile nanopore membranes enables new applications for sensing and transporting small-scale materials.

UR - http://www.scopus.com/inward/record.url?scp=85058393396&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058393396&partnerID=8YFLogxK

U2 - 10.1039/c8nr06441e

DO - 10.1039/c8nr06441e

M3 - Article

VL - 10

SP - 22623

EP - 22634

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 47

ER -