More Like this

1. On the Friction Behavior of SiO 2 Tip Sliding on the Au(111) Surface: How Does an Amorphous SiO 2 Tip Produce Regular Stick–Slip Friction and Friction Duality?

   https://doi.org/10.1021/acs.langmuir.3c00237  

   Xu, Rong-Guang ; Zhang, Gunan ; Xiang, Yuan ; Leng, Yongsheng ( May 2023 , Langmuir)
2. Accuracy of tip-sample interaction measurements using dynamic atomic force microscopy techniques: Dependence on oscillation amplitude, interaction strength, and tip-sample distance

   https://doi.org/10.1063/1.5089634  

   Dagdeviren, Omur E. ; Schwarz, Udo D. ( March 2019 , Review of Scientific Instruments)
3. VPS45 is required for both diffuse and tip growth of Arabidopsis thaliana cells

   https://doi.org/10.3389/fpls.2023.1120307  

   Mugume, Yosia ; Roy, Rahul ; Agbemafle, William ; Shepard, Gabriella N. ; Vue, Yee ; Bassham, Diane C. ( February 2023 , Frontiers in Plant Science)

   VPS45 belongs to the Sec1/Munc18 family of proteins, which interact with and regulate Qa-SNARE function during membrane fusion. We have shown previously thatArabidopsis thalianaVPS45 interacts with the SYP61/SYP41/VTI12 SNARE complex, which locates on thetrans-Golgi network (TGN). It is required for SYP41 stability, and it functions in cargo trafficking to the vacuole and in cell expansion. It is also required for correct auxin distribution during gravitropism and lateral root growth.

   Asvps45knockout mutation is lethal in Arabidopsis, we identified a mutant,vps45-3, with a point mutation in theVPS45gene causing a serine 284-to-phenylalanine substitution. The VPS45-3 protein is stable and maintains interaction with SYP61 and SYP41. However,vps45-3plants display severe growth defects with significantly reduced organ and cell size, similar tovps45RNAi transgenic lines that have reduced VPS45 protein levels. Root hair and pollen tube elongation, both processes of tip growth, are highly compromised invps45-3. Mutant root hairs are shorter and thicker than those of wild-type plants, and are wavy. These root hairs have vacuolar defects, containing many small vacuoles, compared with WT root hairs with a single large vacuole occupying much of the cell volume. Pollen tubes were also significantly shorter invps45-3compared to WT.

   We thus show that VPS45 is essential for proper tip growth and propose that the observed vacuolar defects lead to loss of the turgor pressure needed for tip growth.

    

   more » « less
4. Automated Tip Conditioning for Scanning Tunneling Spectroscopy

   https://doi.org/10.1021/acs.jpca.0c10731  

   Wang, Shenkai ; Zhu, Junmian ; Blackwell, Raymond ; Fischer, Felix R. ( February 2021 , The Journal of Physical Chemistry A)
5. Photoacoustic-based visual servoing of a needle tip

   https://doi.org/10.1038/s41598-018-33931-9  

   Lediju Bell, Muyinatu A. ; Shubert, Joshua ( December 2018 , Scientific Reports)