Measurement of nano particle adhesion by atomic force microscopy using probability theory based analysis

Geiger, Daniel L.; Schrezenmeier, Irina; Roos, Matthias; Neckernuß, Tobias; Lehn, Michael; Marti, Othmar

doi:10.1088/1361-6463/aa6703

Cited by 5 publications

(5 citation statements)

References 32 publications

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“…The confocal Raman spectral mapping images further confirmed that modification of PVP-Au NPs can greatly improve the repeatability of the silver needle-based SERS sensor (Figure S5 and Figure S6). Measurement of nanoparticle adhesion is usually by atomic force microscopy . As shown in Figure f, we distinguish points A and B by assessing the physical deformation of the PVP adhesive layer, and the distance |AB| can be found by solving a contact problem of elasticity, in which a is the contact angle of the cantilever arm and the needle body.…”

Section: Resultsmentioning

confidence: 99%

“…Measurement of nanoparticle adhesion is usually by atomic force microscopy. 30 As shown in Figure 1f, we distinguish points A and B by assessing the physical deformation of the PVP adhesive layer, and the distance |AB| can be found by solving a contact problem of elasticity, in which a is the contact angle of the cantilever arm and the needle body. The adhesive force of the adhesive joint between an Au NP and AgN, P, can be estimated as…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Amphiphilic Functionalized Acupuncture Needle as SERS Sensor for In Situ Multiphase Detection

et al. 2018

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Surface enhanced Raman spectroscopy (SERS) is a powerful spectroscopic technique with unique vibrational fingerprints, making it an ideal candidate for in situ multiphase detection. However, it is a great challenge to determine how to guide the SERS sensor to target molecules of interest in multiphase heterogeneous samples with minimal disturbance. Here, we present a portable ultrasensitive and highly repeatable SERS sensor for in situ multiphase detection. The sensor is composed of commercial Ag acupuncture needle and PVP-Au nanoparticles (Au NPs). The PVP on the Au NPs can adsorb and induce the Au NPs into a highly uniform array on the surface of the Ag needle because of its adhesiveness and steric nature. The Au NPs-Ag Needle system (Au-AgN) holds a huge SERS effect, which is enabled by the multiple plasmonic couplings from particle-film and interparticle. The PVP, as the amphiphilic polymer, promotes the target molecules to adsorb on surface of the Au-AgN whether in the oil phase or in the water phase. In this work, the Au-AgN sensor was directly inserted into the multiphase system with the laser in situ detection, and SERS detection at different spots of the Au-AgN sensor provided Raman signal of targets molecule in the different phase. In situ multiphase detection can minimize the disturbance of sampling and provide more accurate information. The facile fabrication and amphiphilic functionalization make Au-AgN sensor as generalized SERS detection platform for on-site testing of aqueous samples, organic samples, even the multiphase heterogeneous samples.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Amphiphilic Functionalized Acupuncture Needle as SERS Sensor for In Situ Multiphase Detection

et al. 2018

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“…A case in point is the effort made to measure adhesion force, which is essential in the interaction between particles in nano scale. Authors in [171], offer a systematic methodology to measure adhesion, based on probability theory, and a solution to avoid errors caused by force measurement. Similarly, authors of [172] studied adhesion reduction when water changes form from planar into curved, and suggested some applications for their findings, namely design of nano-biomaterials by surfacetension control.…”

Section: Nano (Micro) Measurement Engineeringmentioning

confidence: 99%

A holistic survey on mechatronic Systems in Micro/Nano scale with challenges and applications

Ghanbarzadeh-Dagheyan

Jalili

Ahmadian

2021

J Micro-Bio Robot

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Micro/Nano mechatronic systems might be defined as systems that include nano-or micro-scale components. These components can be sensors, actuators, and/or physical structures. Furthermore, the high-precision control laws for such small scales are important to ensure stability, accuracy, and precision in these systems. In this writing, four categories of such small-scale systems are considered by providing multifarious novel or key examples from the literature: control engineering and modeling, design and fabrication, measurement engineering, and sensor/actuator development. The applications discussed in the examples vary from nano-positioners, crucial in systems such as atomic force microscopes, to biological sensors like carbon nano-tubes that respond to chemical or molecular stimuli. It is observed that in many instances, especially in micro−/nano-robots, the categories overlap for the completion of a system that needs to be small in size, to be controllable with high accuracy, to have high precision sensing capacity, and finally to be able to carry out submillimeter measurements. Thus, a holistic point of view upon such systems is necessary for future applications. This paper does not limit the type of sensors or actuators to the industrial ones and extends the investigated examples to encompass biological sensing and actuating mechanisms that respond to chemical stimuli, proposing for the inclusion of these units in nano −/micro-mechatronic systems intended to be used in human body or other bio-environments. Several other research opportunities are discussed, challenges in the field are identified, and some propositions are put forward for future directions.

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“…The linear law is unlikely since it predicts the existence of an oxide layer in place of the plateaus before the sample preparation. To devise a relation between the plateau height and the measured lateral force upon particle release, we assume that the lateral force is proportional to the interaction forces between particle and contact surface [26]. Picturing a spherical particle lying in a spherical shell of silicon oxide growing around the particle, we suggest two intuitive options: 1) the lateral force is proportional to the contact area between particle and spherical shell or 2) it is proportional to the circumference of the shell, as for a droplet.…”

Section: Sample Preparationmentioning

confidence: 99%

Deal-Grove Oxidation and Nanoparticle Adhesion - an AFM Study

Wanjura,

Geiger,

Schrezenmeier

et al. 2019

Preprint

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We study the formation of nanometer thick oxide layers around nanoparticles (plateaus) in a wet nitrogen environment over 32 days. We determine both the plateau height and the lateral force needed to remove the particles with an atomic force microscope (AFM). The height is well described by the Deal-Grove model for a thermally activated diffusion limited oxidation process. Furthermore, we observe that height and force appear to be correlated suggesting that the rise in adhesion forces is mainly governed by an oxidation process. Since the plateaus are the result of a change in the chemical structure, the surface remains permanently altered even after the removal of the nanoparticles. This observation is of great importance for many applications requiring smooth silicon surfaces, such as photolithography, where small contamination can cause the observed oxidation process and significantly increase the surface roughness.

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Measurement of nano particle adhesion by atomic force microscopy using probability theory based analysis

Cited by 5 publications

References 32 publications

Amphiphilic Functionalized Acupuncture Needle as SERS Sensor for In Situ Multiphase Detection

Amphiphilic Functionalized Acupuncture Needle as SERS Sensor for In Situ Multiphase Detection

A holistic survey on mechatronic Systems in Micro/Nano scale with challenges and applications

Deal-Grove Oxidation and Nanoparticle Adhesion - an AFM Study

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