KPFM

Revisiting Contact Potential Difference in Electrostatic Force Microscopy

Electrostatic Force Microscopy (EFM) is an important atomic force microscopy (AFM) technique for investigating electrical properties and electrostatic interactions at the nanoscale. Achieving quantitative EFM… Read More »Revisiting Contact Potential Difference in Electrostatic Force Microscopy

Teaching an old dog new tricks: Ti-doped ZnFe2O4 as active material in zinc ion batteries – a proof of concept

Fig. 5 from “Teaching an old dog new tricks: Ti-doped ZnFe2O4 as active material in zinc ion batteries – a proof of concept” by Susanna Krämer et al. 2024: (a) Work function (Φ) measurements of ZFO, ZFTO7 and ZFTO13 (black squares) and data for the band gap energies (Eg) calculated from the Tauc plot for all samples except ZFTO25 (red circles). Error bars of work function are standard deviation from the average value. (b) Exemplary KPFM image of ZFO with grain boundaries showing lower surface potential (blue) than grain interior (green). Kelvin Probe Force Microscopy (KPFM) measurements were performed in an Ar atmosphere using a commercially available atomic force microscopy with conductive NANOSENSORS PPP-NCSTPt AFM tips. *

ZnFe2O4 is a well-investigated, versatile material with a spinel structure, which reportedly shows electrical conductivity in the range of 5 to 10 mS cm−1, a… Read More »Teaching an old dog new tricks: Ti-doped ZnFe2O4 as active material in zinc ion batteries – a proof of concept

Operando Characterizations of Light-Induced Junction Evolution in Perovskite Solar Cells

by NANOSENSORS
30 May 202330 May 2023
Science & Technology

Figure 1 from “Operando Characterizations of Light-Induced Junction Evolution in Perovskite Solar Cells” by Chuanxiao Xiao et al. Experiment schematic. KPFM scans on the cleaved cross-sectional surface. Ultrafast spectroscopy measurements were in both TA and TR setups. NANOSENSORS Platinum-Iridium coated PointProbe Plus PPP-EFM AFM probes were used for the Kelvin Probe Force Microscopy.

Light-induced performance changes in metal halide perovskite solar cells (PSCs) have been studied intensively over the last decade, but little is known about the variation… Read More »Operando Characterizations of Light-Induced Junction Evolution in Perovskite Solar Cells

Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2

by NANOSENSORS
28 November 202215 March 2023
Science & Technology

Figure 4 from by “Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2” Monica Luna et al : Topography (top) and VCPD (bottom) images of a 3 nm diameter Au NP on bare TiO2(110) (a) in the dark and (b) under UV illumination. VCPD profiles are shown at the bottom. Color scale in topography: (a) 3.6 nm and (b) 4 nm. A CPD image of a larger sample area can be found in the Supporting Information (Figure S10). NANOSENSORS tip view conductive AdvancedTEC ATEC-EFM AFM probes were used.

Numerous advances of societal significance, such as CO2 conversion to fuels, hydrogen production by water splitting, and new materials with self-cleaning and antifogging properties, are… Read More »Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2

Nanoscale Charge Accumulation and Its Effect on Carrier Dynamics in Tri-cation Perovskite Structures

by NANOSENSORS
26 November 202015 March 2023
Science & Technology

Figure 3. from “Nanoscale Charge Accumulation and Its Effect on Carrier Dynamics in Tri-cation Perovskite Structures” by David Toth et al: Initial dark and relaxed closed-loop KPFM analysis of CsFAMAPbBrI. (a) Topography channel plotting surface height. (b) KPFM image prior to light pulse plotting Vcpd. (c) KPFM image seconds after the light pulse plotting Vcpd. (d) 3D topography overlaid with the calculated ΔVcpd map. (e) Histograms of before and after Vcpd maps separated into grain and GB responses. The double arrows indicate the difference between the mean values of the distributions. NANOSENSORS™ Platinumum-Silicide PtSi-CONT AFM probes were used for the KPFM measurements.

Nanoscale investigations by scanning probe microscopy have provided major contributions to the rapid development of organic–inorganic halide perovskites (OIHP) as optoelectronic devices. Further improvement of… Read More »Nanoscale Charge Accumulation and Its Effect on Carrier Dynamics in Tri-cation Perovskite Structures

Multi-Channel Exploration of O Adatom on TiO2(110) Surface by Scanning Probe Microscopy

by NANOSENSORS
5 October 202015 March 2023
Science & Technology

Figure 5. from “Multiple images of TiO2(110) surface with atomic resolution and corresponding line profiles” by Huan Fei Wen et al. (a) Frequency shift (∆f) image, (b) tunneling current () image and (c) local contact potential difference (VLCPD) image. (d,e) The line profiles along the blue line on the surface in (b,c). (f0 = 805 kHz, Q = 27623, ∆f = −260 Hz, VDC = 1.3 V, VAC = 1.5 V, A = 500 pm, size: 3.5 × 3.2 nm2). Multiple images of TiO2(110) surface with atomic resolution and corresponding line profiles. (a) Frequency shift (∆f) image, (b) tunneling current () image and (c) local contact potential difference (VLCPD) image. (d,e) The line profiles along the blue line on the surface in (b,c). (f0 = 805 kHz, Q = 27623, ∆f = −260 Hz, VDC = 1.3 V, VAC = 1.5 V, A = 500 pm, size: 3.5 × 3.2 nm2). - Ultrastiff NANOSENSORS SD-T10L100 AFM probes were used.

In the article “Multi-Channel Exploration of O Adatom on TiO2(110) Surface by Scanning Probe Microscopy” Huan Fei Wen, Yasuhiro Sugawara and Yan Jun describe how… Read More »Multi-Channel Exploration of O Adatom on TiO2(110) Surface by Scanning Probe Microscopy

Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host

by NANOSENSORS
20 September 202015 March 2023
Science & Technology

Supplementary Figure 1 a – d from “Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host” by K. Geirhos et al: Typical ferroelectric do-main pattern observed on the (001) cleaved GaV4Se8 crystal surface atT=10 K. a, The topography is characterized by stripes roughly parallel to the [110] axis and folds parallel to the [010] axis. The latter originate in the differently oriented distortion of the ferroelastic domains. The color scale corresponds to the z-displacement of the tip. b ,In the dissipation channel of the nc-AFM every second domain appears bright. For the non-magnetic tip the dissipation originates from electric interactions. The dissipated power is indicated by the color scale. Please have a look at the full article to view the full supplementary figure. NANOSENSORS Platinum Silicide PtSi-FM AFM probes were used for the imaging.

In the article “Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host” Korbinian Geirhos, Boris Gross, Bertalan G. Szigeti, Andrea Mehlin,… Read More »Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host