Historical research guide · 0893 · 2018

The Casimir effect and its role in nanotechnology applications

Fabrizio Pinto

In one minute

Fabrizio Pinto’s keynote puts one force in its full history. Neutral objects attract each other at close range — van der Waals described that — and Casimir showed the attraction becomes a different thing once the gap is wide enough that the finite speed of light matters. Pinto then follows how experimenters learned to measure that force precisely enough to test quantum electrodynamics against it. The turn comes at the end. In a semiconductor, Pinto stresses, the force is not fixed: shine light on the material and the force changes. That means an ordinary laboratory knob, illumination, moves a vacuum force in real time. A force you can switch is a force you can drive around a loop, and Pinto draws the conclusion directly — engine cycles at the nanoscale, powered by dispersion forces, and the applications already being explored from them: sensing, actuation, space propulsion and energy storage. It is the shortest route from the vacuum being real to the vacuum being useful.

Connection

Chapter 2 says the vacuum is a structured medium; chapter 6 asks whether it can be made to do work. Pinto’s answer is the most concrete one in the literature — the force is already measured to high precision, and it already has a control knob, which is exactly what an engine cycle needs.

From the source

Dispersion forces are one family with one history. Pinto traces the thread from ancient observations of attraction between bodies, through the unretarded van der Waals forces of short separations, to the fully retarded regime at larger gaps, which is the regime properly called the Casimir force. The distinction is physical, not verbal: retardation is the finite travel time of the field between the two surfaces.Author’s abstract, first sentence
The experimental record is a story of increasing accuracy aimed at one target. Pinto reviews the evolution of experimental attempts to characterise dispersion interactions accurately enough to permit meaningful comparison with the theoretical predictions of quantum electrodynamics. That comparison is what moved the Casimir force from prediction to measured fact.Author’s abstract, second sentence
The load-bearing result of the talk is that the force can be modulated in time. Pinto calls it a momentous discovery that dispersion forces in semiconductors can be time-modulated by acting on suitable environmental variables such as illumination — that is, the vacuum force between two surfaces changes when you shine light on one of them, because the light changes the material’s charge-carrier density and therefore its optical response.Author’s abstract, third sentence
A modulated force permits an engine cycle. If the force between two surfaces can be made large on the way in and small on the way out, the surfaces can be taken around a closed loop in the force-and-separation plane that does not return to its starting energy — a dispersion-force-driven nanoscale engine. Pinto states this as the direct consequence of the modulation result rather than as a separate speculation.Author’s abstract, closing sentence
The application list is specific and it is already being worked on: sensing, actuation, space propulsion, and energy storage. Pinto names these as breakthrough applications now being explored, which places the subject in a development programme rather than in a thought experiment — and puts vacuum-force propulsion and vacuum-force energy handling in the same sentence, which is where this site keeps them.Author’s abstract, closing sentence
What to watch: the measurement that would settle the engine question is a complete, instrumented cycle whose net work output is measured against every loss in the loop — the optical power that drives the modulation, the dissipation in the moving element, and the recovery on the return stroke. Pinto’s abstract names the cycle; the number that decides it is the balance sheet for one full revolution, and every group building an optically switched Casimir device is working toward it.Author’s abstract, closing sentence, read against the modulation result in the sentence before it

The way in

https://doi.org/10.1016/j.matpr.2018.05.041

Historical source-access record. This guide links to the original; it does not reproduce the paper text.

LICENCE CHECKED. Published in Materials Today: Proceedings, volume 5, issue 8, pages 15976 to 15982 (2018), as the written version of a Keynote talk. Crossref deposits only Elsevier’s text-and-data-mining user licence, which is not a licence to readers; OpenAlex and Unpaywall both report the record closed with no repository copy anywhere on 2026-09-08. No Creative Commons statement exists, so no text of the paper is reproduced here. SOURCE READ. The ScienceDirect page returns 403 to an automated reader and no preprint was found, so the full paper could not be opened. This sheet is written from the author’s complete abstract, which Elsevier deposited and which was retrieved in full through the OpenAIRE record for the DOI on 2026-09-08, together with the bibliographic record; every locator below points to a sentence of that abstract and says so. Semantic Scholar records 22 references, the scale of a keynote review rather than a single experiment. When the full text can be read, this sheet should be rewritten from it. Fabrizio Pinto worked at NASA’s Jet Propulsion Laboratory before founding Interstellar Technologies Corporation, and has spent three decades on the engineering of dispersion forces; his companion papers on this site are listed at the foot of this page.

How to cite it

Fabrizio Pinto (2018) The Casimir effect and its role in nanotechnology applications doi:10.1016/j.matpr.2018.05.041

Where it sits in the curriculum

Casimir physics and vacuum-force engineering