Internal Structure Refinement of Porous Sintered Silver via Electromigration

TY - JOUR

T1 - Internal Structure Refinement of Porous Sintered Silver via Electromigration

AU - Mansourian, Ali

AU - Paknejad, Seyed Amir

AU - Wen, Qiannan

AU - Khtatba, Khalid

AU - Zayats, Anatoly V.

AU - Mannan, Samjid H.

PY - 2016/5

Y1 - 2016/5

N2 - Atoms can move under high stress conditions such as temperature, mechanical pressure or electric current. Electromigration provides a driving force to move the atoms in metals conducting current usually resulting in the accumulation of atoms and void formation in anode and cathode respectively. The electromigration effect is normally considered a serious problem for electronic circuits but the recent works1-7 show that it can be used constructively for controlled fabrication of nanostructures2-4.We demonstrate that electromigration can be utilized to refine the porous structure of a sintered silver stripe leading to transformation of the internal pore and grain structure. The results show that pore shape, size and distribution are significantly changed after electromigration. Similarly, we have used the electromigration effect to mass produce nanorods under current densities of the order of 2.4 ×10+8 A/m2. Nanorods were formed across the whole stripe contrasting with studies on non-porous substrates which show nanorod production at the anode only. The results show the internal pore structure can be transformed and refined by electromigration. The results also suggest that by controlling current densities in a porous substrate, complex patterns of porous structures and high-quality single crystal nanorods can be formed insitu with significant advantages over competing methods of nanorod formation for sensor applications.

AB - Atoms can move under high stress conditions such as temperature, mechanical pressure or electric current. Electromigration provides a driving force to move the atoms in metals conducting current usually resulting in the accumulation of atoms and void formation in anode and cathode respectively. The electromigration effect is normally considered a serious problem for electronic circuits but the recent works1-7 show that it can be used constructively for controlled fabrication of nanostructures2-4.We demonstrate that electromigration can be utilized to refine the porous structure of a sintered silver stripe leading to transformation of the internal pore and grain structure. The results show that pore shape, size and distribution are significantly changed after electromigration. Similarly, we have used the electromigration effect to mass produce nanorods under current densities of the order of 2.4 ×10+8 A/m2. Nanorods were formed across the whole stripe contrasting with studies on non-porous substrates which show nanorod production at the anode only. The results show the internal pore structure can be transformed and refined by electromigration. The results also suggest that by controlling current densities in a porous substrate, complex patterns of porous structures and high-quality single crystal nanorods can be formed insitu with significant advantages over competing methods of nanorod formation for sensor applications.

KW - Electromigration

KW - Internal structure refinement

KW - Nanorod

KW - Porous sintered silver

UR - http://www.scopus.com/inward/record.url?scp=84995629570&partnerID=8YFLogxK

U2 - 10.4071/2016-HITEC-190

DO - 10.4071/2016-HITEC-190

M3 - Conference paper

SN - 2380-4491

VL - 2016

SP - 190

EP - 195

JO - IMAPS Additional Conferences (Device Packaging, HiTEC, HiTEN, & CICMT)

JF - IMAPS Additional Conferences (Device Packaging, HiTEC, HiTEN, & CICMT)

T2 - IMAPS International Conference and Exhibition on High Temperature Electronics, HiTEC 2016

Y2 - 10 May 2016 through 12 May 2016

ER -