Recent content by frenchero

Hi everybody, I would like to use a 9V pp3 battery with a device with a rate of order of µA. Iwanted to use Peukert's law to calculate the duration of my battery but I am not quite sure if it is applicable for such low current... Won't a battery with 1200mAh capacity discharge too fast...

another really important that I forgot to mention is that the silanol groups create a double layer in my system by exchanging protons so I need to keep protons which I do not if I condense silanol groups.

but would not heating cause extra damages to the glass before the silanol groups condense? I mean in this form glass is pretty stable and you will have to heat at high temperature won't you?

Hi, I am performiong electromosis into glass channels and I would like to reduce the silanol group conductivity. I am not an expert in surface treatment and I only know treatment with OTS but it makes the cannel become too hydrophobiac to use aquaeous solutions and that's hat I am using. Any...

In fact i have a pump with two inlets and two outlet but I only want to use one inlet and one outlet. I cannot shut the useles inlet and outlet because the pump is not self priming and thus I have to fill the pump and then close the inlet and outlet because I don't want any liquid to come in or...

Hi, I didn't know where to put my thread so I hope this is the good place. I have a technical issue concerning capillaries! I use capillaries to fill a mircofluidic network and I am desperately looking for a way to prevent air from coming inside capilarry and thus coming inside my microfluidic...

thank you! I am not reaaly an expert in electronics! and do you know a site that references suppliersfor this?

Hi, Here is my problem, I am using a circuit with two SPDT switches that I would need to make work in phase. I would like to activate the two SPDT switches with an another SPDT switch in order to put the two first PDT in one position at the same time (the use of only one external switch is...

Hello everybody! I am working on bubble formation issue in electroosmotic pumps. Those bubble are formed by water electrolysis on platinium electrode and I am searching for catalyst for water recombination compatible with biological applications to at least slow down the bubble formation...

Hi, Would somebody know if it is possible to bond pvdf piezoelectric material on glasse or teflon without making it losing its piezoelectric properties? Thank you! Damien

Hi, I want to calculate the pressure loss coefficient for a diffuser but I can't find the equation. I tried with bernoulli but I don't get it. I've read that the coefficient depends on the length the scale and conical degree of the difuser? Can you help me? thank you!

Hi! This is about electrosmotic micropumps. I don't understand why there is always a reservoir and what is the point of this reservoir on the pumps? Can someone explain it to me? thank you!

HI! I have a question about microfluidic devices. When you enlarge a channel, for example from 100µm to 2mm, is there a big variation of flow rate or back pressure? I can't find the equation to solve this issue. Thank you damien

Hi! I am a french student who's discovering microfluidic through english texts and I am not sure to understand what is a backpressure in this case? Is this a pressure given by the operator or induced by the device?? Thank you for your answers!

could this PVDF film be of the order of 100µm thin? is it easily bondable with glass?