34 Questions 11 Answers 0 Followers
Questions related from Yannapol Sriphutkiat
Dear All, I cultured HUVECs in GelMA+Fibrin construct. But when I do the put DAPI in, it stained both HUVECs and Fibrin network. So the DAPI signal from Fibrin disturbs the signal from HUVECs,...
10 December 2018 3,188 3 View
Dear Experts, I have struggled with bonding issue for quite sometime. Initially, I plasma bonded (Oxygen and Nitrogen) the PDMS on LiNbO3. The bonding worked for the 1st time, but after a while...
30 November 2017 2,676 1 View
Dear All, May I know the best way to do make a simple light sheet for a sample of 1cm x 1cm ?I have a camera with telelens, so the way to obtain the image might not be a problem for me. But I am...
12 July 2017 6,195 1 View
Dear All, I am looking for broadband transducer (PZT plate) which is working in frequency range of 50-500 kHz. Which manufacturer provide it with quite cheap price ? I just need a few pieces which...
17 March 2017 6,020 3 View
Does any machine measure vibration displacement (freq = 100kHz range, displacement of few micrometers) , except laser doppler vibrometer ? Best Regards,Yannapol S.
16 March 2017 1,014 5 View
Dear All, I am quite new with vibration displacement. I have seen that some papers used pinducer connected to oscilloscope to measure transducer vibration displacement. If my transducer is...
16 March 2017 8,235 0 View
Dear All, I am quite new with SAW sensor, At first, I have to understand the fundamental principal For SAW mass sensor, What is the physical explanation/mechanism for frequency shift from mass...
25 September 2016 3,070 2 View
Dear All, I observed that each of microparticle seems to rotate (spin) under the actuation of acoustics wave. I am interesting in this phenomena. Is there any publication about this phenomena...
24 March 2016 9,918 2 View
Dear All, I have to align PDMS on LiNbO3, my channel size is 100 micron. My process parameters are 0.3 Torr, O2 plasma treatment for 2 mins. I put a drop of ethanol on PDMS to align on LiNbO3, I...
28 December 2015 4,725 4 View
Dear All, I am not sure how can I calculate the number of IDT finger in order to achieve 50 ohm resistance. Let's say my strip width is 50 micron. what should be the number of IDT finger for 50...
25 November 2015 6,363 2 View
Dear All, I have photos of particle accumulation in the bottom of the container. How can I find the accumulation rate ? I know PIV that can measure the velocity of the particle in the flow, but I...
20 October 2015 2,091 2 View
If I have IDT electrode pattern on non-piezomaterial substrate, Can I get the Surface Acoustics Wave which is enough to manipulate fluid or particles ?Best Regards,Yannapol S.
14 October 2015 370 1 View
Dear All, I would like to pattern the electrode on LiNbO3 plate. now I have a mask, but I do not know what chemical can be used to etch the LiNbO3 plate Comparing to Silicon lithography process,...
07 October 2015 3,249 4 View
Dear All, What is the normal practice you do to see particle when you put your PDMS microfluidic channel on the LiNbO3 and circulate water + particle through the channel ?My particle is white...
24 September 2015 6,068 3 View
Dear All, How can I attach PDMS channel with LiNbO3 plate without the O2 plasma machine?The aim is to allow the SAW propagation from LiNbO3 to my channelRegards, Yannapol S.
21 September 2015 6,170 4 View
Dear All,I am going to fabricate IDT for Surface Acoustic Wave, is it possible to to do IDT (finger-cross pattern) with screen printing ?Best Regards,Yannapol S.
09 September 2015 3,589 1 View
Dear All, I am using SAW on LiNbO3, I put the water droplet with suspended particles inside. but when I use microscpe to see suspended particles. Under light microscope, I cannot see the particles...
08 September 2015 8,312 5 View
Dear All, I am from mechanical engineering, I am trying to do microchannel structure by using PDMS. I am thinking about the the plastic inner structure and dissolve it later, once PDMS form a...
05 September 2015 9,769 6 View
Dear All,Just a basic question, For LiNbO3 plate, do cutting axis angle and surface finish affect the propagation direction of the SAW? For example, Y-cut with 128 degree and X-cut 128 degree or...
26 August 2015 531 3 View
Dear All, Anyone knows the way to couple Acoustic to Laminar flow ? The concept is Acoustic Radiation force turns to be -> Acoustic Streaming in Laminar flow that can make the velocity profile...
17 August 2015 2,522 2 View
Dear All, There are various mode of vibration for cylindrical transducer,according to http://www.phy.olemiss.edu/~jgladden/rus/. My transducer has 17mm inner diameter, 1 mm thickness, and 20 mm...
28 July 2015 7,674 3 View
Dear ALL, I would like to generate SAW for my small microchannel (As in the attachment). The media is water and the range of frequency is around 2-30 MHzThe orifice size is around 1 mm, SAW...
27 July 2015 1,373 9 View
My device to measure is cylindrical transducer..... The problem is ..at the first time, I measure the impedance I obtain value, then I move my transducer and measure impedance again. The impedance...
11 July 2015 6,956 4 View
Dear All,Does anyone know a thin flexible heat insulator which follows the constraints below?Constraint : 1) Thickness is (less than 1 mm) preferably 0.5 mm 2) Acoustic Impedance should equal or...
03 July 2015 7,112 2 View
Dear All,I would like to generate 5V pulse from DAQ by using Labview.First of all, my DAQ does not have counter. Therefore, I use https://decibel.ni.com/content/docs/DOC-15219 to generate pulse...
16 April 2015 9,727 3 View
How can I adjust 5V DIOutput from this Block Diagram ?https://decibel.ni.com/content/docs/DOC-15219
05 April 2015 3,252 1 View
Dear All,I started using LabView yesterday.In LabView, How can I create square wave as the control signal ? Is it similar to the PWM (pulse wave modulation) ?Please advise .....Best...
25 March 2015 5,134 11 View
Can anyone tell me how to calculate piezoelectric output vibration (Pressure or force as function of time) from the input voltage?What equation should I use? Best Regards,Yannapol S.
14 March 2015 7,444 7 View
Dear All,I am simulating Fluid Structure interaction. I have followed tutorial https://www.youtube.com/watch?v=oOGkvrnKS-cThis tutorial was set as following .... For Structure,Time step size =...
28 February 2015 6,754 3 View
Hi, has anyone used FSI before? I have an error (see attached). I have tried changing parameters, but I still cannot handle this. "System Coupling run completed with errors. Fluid...
23 February 2015 5,310 7 View
Dear All,I am simulating the deposition/ accretion of the small particle of the nozzle wall. I have stuck this problem a month, I have worked >10 hrs a day , somebody please help me. First, I...
21 February 2015 3,415 4 View
I run the transient study in Fluent and try to open it in CFD Post, but it error Like this. I really don't know How it is happen, I did not interrupt the file during the file was saving. Could you...
20 February 2015 2,124 5 View
Dear All,I would like to ask you, in Fluent Multi-phase flow (Eulerian), How secondary phase block primary phase ? If my have very high fraction of secondary phase, the primary will be blocked or...
18 February 2015 463 3 View
I would like to simulate the clogging of nozzle from the deposition of solid particle, but it seems to be that Comsol consider particle as a point (dimesionless) Therefore, when the particle...
29 January 2015 4,637 3 View
