Cover Image

Mechanical deformation distinguishes tunneling pathways in molecular junctions

Developing a clearer understanding of electron tunneling through molecules is a central challenge in molecular electronics. Here we demonstrate the use of mechanical stretching to distinguish orbital pathways that facilitate tunneling in molecular junctions. Our experiments employ junctions based on...

Full description

Saved in:
Bibliographic Details
Main Authors: Xie, Zuoti (Author) , Bâldea, Ioan (Author)
Format: Article (Journal)
Language:English
Published: 2019
In: Journal of the American Chemical Society
Year: 2018, Volume: 141, Issue: 1, Pages: 497-504
ISSN:1520-5126
DOI:10.1021/jacs.8b11248
Online Access:Verlag, Volltext: https://doi.org/10.1021/jacs.8b11248
Get full text
Author Notes:Zuoti Xie, Ioan Bâldea, Greg Haugstad, and C. Daniel Frisbie

MARC

LEADER 00000caa a2200000 c 4500
001 1665623470
003 DE-627
005 20230426084945.0
007 cr uuu---uuuuu
008 190515r20192018xx |||||o 00| ||eng c
024 7 |a 10.1021/jacs.8b11248  |2 doi 
035 |a (DE-627)1665623470 
035 |a (DE-599)KXP1665623470 
035 |a (OCoLC)1341220196 
040 |a DE-627  |b ger  |c DE-627  |e rda 
041 |a eng 
084 |a 30  |2 sdnb 
100 1 |a Xie, Zuoti  |e VerfasserIn  |0 (DE-588)1186182083  |0 (DE-627)1665709472  |4 aut 
245 1 0 |a Mechanical deformation distinguishes tunneling pathways in molecular junctions  |c Zuoti Xie, Ioan Bâldea, Greg Haugstad, and C. Daniel Frisbie 
264 1 |c 2019 
300 |a 8 
336 |a Text  |b txt  |2 rdacontent 
337 |a Computermedien  |b c  |2 rdamedia 
338 |a Online-Ressource  |b cr  |2 rdacarrier 
500 |a Published: December 8, 2018 
500 |a Gesehen am 15.05.2019 
520 |a Developing a clearer understanding of electron tunneling through molecules is a central challenge in molecular electronics. Here we demonstrate the use of mechanical stretching to distinguish orbital pathways that facilitate tunneling in molecular junctions. Our experiments employ junctions based on self-assembled monolayers (SAMs) of homologous alkanethiols (CnT) and oligophenylene thiols (OPTn), which serve as prototypical examples of σ-bonded and π-bonded backbones, respectively. Surprisingly, molecular conductances (Gmolecule) for stretched CnT SAMs have exactly the same length dependence as unstretched CnT SAMs in which molecular length is tuned by the number of CH2 repeat units, n. In contrast, OPTn SAMs exhibit a 10-fold-greater decrease in Gmolecule with molecular length for stretched versus unstretched cases. Experiment and theory show that these divergent results are explained by the dependence of the molecule-electrode electronic coupling Γ on strain and the spatial extent of the principal orbital facilitating tunneling. In particular, differences in the strain sensitivity of Γ versus the repeat-length (n) sensitivity can be used to distinguish tunneling via delocalized orbitals versus localized orbitals. Angstrom-level tuning of interelectrode separation thus provides a strategy for examining the relationship between orbital localization or delocalization and electronic coupling in molecular junctions and therefore for distinguishing tunneling pathways. 
534 |c 2018 
700 1 |a Bâldea, Ioan  |e VerfasserIn  |0 (DE-588)1049572033  |0 (DE-627)782333303  |0 (DE-576)403568498  |4 aut 
773 0 8 |i Enthalten in  |a American Chemical Society  |t Journal of the American Chemical Society  |d Washington, DC : ACS Publications, 1879  |g 141(2019), 1, Seite 497-504  |w (DE-627)268132836  |w (DE-600)1472210-0  |w (DE-576)090854284  |x 1520-5126  |7 nnas 
773 1 8 |g volume:141  |g year:2019  |g number:1  |g pages:497-504  |g extent:8  |a Mechanical deformation distinguishes tunneling pathways in molecular junctions 
856 4 0 |u https://doi.org/10.1021/jacs.8b11248  |x Verlag  |x Resolving-System  |3 Volltext 
951 |a AR 
992 |a 20190515 
993 |a Article 
994 |a 2019 
998 |g 1049572033  |a Bâldea, Ioan  |m 1049572033:Bâldea, Ioan  |d 120000  |d 120300  |e 120000PB1049572033  |e 120300PB1049572033  |k 0/120000/  |k 1/120000/120300/  |p 2 
999 |a KXP-PPN1665623470  |e 3475864169 
BIB |a Y 
SER |a journal 
JSO |a {"type":{"media":"Online-Ressource","bibl":"article-journal"},"note":["Published: December 8, 2018","Gesehen am 15.05.2019"],"recId":"1665623470","id":{"eki":["1665623470"],"doi":["10.1021/jacs.8b11248"]},"name":{"displayForm":["Zuoti Xie, Ioan Bâldea, Greg Haugstad, and C. Daniel Frisbie"]},"physDesc":[{"extent":"8 S."}],"origin":[{"dateIssuedKey":"2019","dateIssuedDisp":"2019"}],"relHost":[{"pubHistory":["1.1879 -"],"type":{"media":"Online-Ressource","bibl":"periodical"},"note":["Gesehen am 25.08.2020"],"recId":"268132836","part":{"text":"141(2019), 1, Seite 497-504","pages":"497-504","year":"2019","extent":"8","volume":"141","issue":"1"},"titleAlt":[{"title":"JACS"},{"title":"web edition"}],"id":{"eki":["268132836"],"zdb":["1472210-0"],"issn":["1520-5126"]},"corporate":[{"display":"American Chemical Society","role":"aut","roleDisplay":"VerfasserIn"}],"name":{"displayForm":["Ed.: Allen J. Bard [u.a.]"]},"origin":[{"publisher":"ACS Publications ; American Chemical Society","dateIssuedDisp":"1879-","dateIssuedKey":"1879","publisherPlace":"Washington, DC ; Washington, DC"}],"language":["eng"],"disp":"American Chemical SocietyJournal of the American Chemical Society","title":[{"subtitle":"JACS","title_sort":"Journal of the American Chemical Society","title":"Journal of the American Chemical Society"}]}],"person":[{"family":"Xie","given":"Zuoti","role":"aut","roleDisplay":"VerfasserIn","display":"Xie, Zuoti"},{"roleDisplay":"VerfasserIn","role":"aut","given":"Ioan","display":"Bâldea, Ioan","family":"Bâldea"}],"language":["eng"],"title":[{"title_sort":"Mechanical deformation distinguishes tunneling pathways in molecular junctions","title":"Mechanical deformation distinguishes tunneling pathways in molecular junctions"}]} 
SRT |a XIEZUOTIBAMECHANICAL2019 

Similar Items