TY - JOUR
T1 - Optimized hand fabricated AFM probes for simultaneous topographical and electrochemical tapping mode imaging
AU - Rodriguez, Raul D.
AU - Anne, Agnès
AU - Cambril, Edmond
AU - Demaille, Christophe
PY - 2011/7/1
Y1 - 2011/7/1
N2 - In this work hybrid AFM-electrochemical (SECM) probes to be used in dynamic atomic force microscopy are presented. These nanosensors are hand fabricated from gold microwires using a simple benchtop method. They display proportions close to commercially available silicon and silicon nitride cantilevers giving comparable performance in terms of resolution and imaging stability. The remarkable characteristic of these hybrid nanosensors is that they allow the coupling of 3D imaging ability and versatility of atomic force microscopy with the power of electrochemical methods. Local measurement of electrochemical-activity of a test sample consisting of gold bands functionalized by redox-labeled nanometer-sized polyethylene glycol chains has been achieved with simultaneous imaging of the 3D surface topography at high resolution. These hybrid AFM-SECM tips are capable of sensing local electrochemical currents down to ~10. fA emphasizing the sensitivity and resolution of this technique.
AB - In this work hybrid AFM-electrochemical (SECM) probes to be used in dynamic atomic force microscopy are presented. These nanosensors are hand fabricated from gold microwires using a simple benchtop method. They display proportions close to commercially available silicon and silicon nitride cantilevers giving comparable performance in terms of resolution and imaging stability. The remarkable characteristic of these hybrid nanosensors is that they allow the coupling of 3D imaging ability and versatility of atomic force microscopy with the power of electrochemical methods. Local measurement of electrochemical-activity of a test sample consisting of gold bands functionalized by redox-labeled nanometer-sized polyethylene glycol chains has been achieved with simultaneous imaging of the 3D surface topography at high resolution. These hybrid AFM-SECM tips are capable of sensing local electrochemical currents down to ~10. fA emphasizing the sensitivity and resolution of this technique.
KW - AFM-SECM
KW - Hand fabricated AFM probes
KW - Hybrid AFM probes
KW - Scanning electrochemical microscopy
KW - Tapping mode imaging
UR - http://www.scopus.com/inward/record.url?scp=79959982318&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959982318&partnerID=8YFLogxK
U2 - 10.1016/j.ultramic.2011.02.001
DO - 10.1016/j.ultramic.2011.02.001
M3 - Article
AN - SCOPUS:79959982318
VL - 111
SP - 973
EP - 981
JO - Ultramicroscopy
JF - Ultramicroscopy
SN - 0304-3991
IS - 8
ER -