Predicting human touch sensitivity to single atom substitutions in surface monolayers for molecular control in tactile interfaces

Nolin, Abigail; Licht, Amanda A.; Pierson, Kelly; Lo, Chen‐Tsyr; Kayser, Laure V.; Dhong, Charles

doi:10.1039/d1sm00451d

Cited by 6 publications

(27 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hysteresis was calculated by taking the difference of each advancing and receding angle pair. 15 We reported the average receding angle, average advancing angle, and standard deviation of the hysteresis.…”

Section: Experimental Methods and Rationalementioning

confidence: 99%

“…The challenge of connecting molecular scale effects with human performance is the inability to sufficiently describe friction with simple material properties such as a constant coefficient of friction, the human variability in applied force and sliding velocity, the contact mechanics of the finger, and the lack of established relationships between friction and tactile percepts. 15–17…”

Section: Introductionmentioning

confidence: 99%

“…21 Our previous work compared nine different SAMs deposited onto the silicon wafers and found that humans were able to discriminate monolayers which differed only by single or several atom differences due to a phase transition between a disordered and ordered monolayer. 15 Humans were able to discriminate surface monolayers, even if the surfaces had similar surface energies. The mechanism of human discriminability was that disordered monolayers increase energy dissipation, resulting in additional frictional and adhesion forces compared to an ordered-like monolayer.…”

Section: Introductionmentioning

confidence: 99%

“…Our approach provides a method to quantify the potential tactile stimuli when subjects explore a surface without restricting the finger, accounts for human variability, and is independent of currently unresolved relationships between friction and human perception. 15…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Controlling fine touch sensations with polymer tacticity and crystallinity

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Experimental Methods and Rationalementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Controlling fine touch sensations with polymer tacticity and crystallinity

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Aristotle's observation that the human hand is the "tool of tools" pays homage to its functionality. Recent studies have demonstrated that our fingertips can detect differences in surfaces altered at the molecular level (Nolin et al, 2021). Reaching out to grasp a coffee cup, manipulating the button of a shirt, or pinching a minute quantity of salt while cooking are difficult tasks to replicate with present day robotic systems.…”

Section: The Ramifications Of Hand Lossmentioning

confidence: 99%

Hand Transplants, Daily Functioning, and the Human Capacity for Limb Regeneration

Fitzpatrick

Brogan

Grover

2022

Front. Cell Dev. Biol.

View full text Add to dashboard Cite

Unlike some of our invertebrate and vertebrate cousins with the capacity to regenerate limbs after traumatic loss, humans do not have the ability to regrow arms or legs lost to injury or disease. For the millions of people worldwide who have lost a limb after birth, the primary route to regaining function and minimizing future complications is via rehabilitation, prosthetic devices, assistive aids, health system robustness, and social safety net structures. The majority of limbs lost are lower limbs (legs), with diabetes and vascular disorders being significant causal contributors. Upper limbs (arms) are lost primarily because of trauma; digits and hands are the most common levels of loss. Even if much of the arm remains intact, upper limb amputation significantly impacts function, largely due to the loss of the hand. Human hands are marvels of evolution and permit a dexterity that enables a wide variety of function not readily replaced by devices. It is not surprising, therefore, for some individuals, dissatisfaction with available prosthetic options coupled with remarkable advances in hand surgery techniques is resulting in patients undertaking the rigors of a hand transplantation. While not “regeneration” in the sense of the enviable ability with which Axolotls can replace a lost limb, hand transplants do require significant regeneration of tissues and nerves. Regaining sophisticated hand functions also depends on “reconnecting” the donated hand with the areas of the human brain responsible for the sensory and motor processing required for complex actions. Human hand transplants are not without controversy and raise interesting challenges regarding the human regenerative capacity and the status of transplants for enabling function. More investigation is needed to address medical and ethical questions prior to expansion of hand transplants to a wider patient population.

show abstract

Bending as Key Mechanism in the Tactile Perception of Fibrillar Surfaces

Gedsun

Sahli

Meng

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

The touching of fibrillar surfaces elicits a broad range of affective reactions, which range from the adverse stinginess of a stiff bristle brush to the pleasant feel of velvet. To study the tactile perception of model fibrillar surfaces, a unique set of samples carrying dense, regular arrays of cylindrical microfibrils with high aspect ratio made from different elastomer materials have been created. Fibril length and material compliance are varied independently such that their respective influence on tactile perception can be elucidated. This work finds that the tactile perception of similarity between samples is dominated by bending of the fibrils under sliding touch. The results demonstrate that variations of material stiffness and of surface structure are not necessarily perceived independently by touch. In the case of fibrillar elastomer surfaces, it is rather the ratio of fibril length and storage modulus which determines fibril bending and becomes the dominant tactile dimension. Visual access to the sample during tactile exploration improves the tactile perception of fibril bendability. Experiments with colored samples show a distraction by color in participants’ decisions regarding tactile similarity only for yellow samples of outstanding brightness.

show abstract

Predicting human touch sensitivity to single atom substitutions in surface monolayers for molecular control in tactile interfaces

Abstract: The mechanical stimuli generated as a finger interrogates the physical and chemical features of an object forms the basis of fine touch. Haptic devices, which are used to control touch,...

Cited by 6 publications

References 63 publications

Controlling fine touch sensations with polymer tacticity and crystallinity

Controlling fine touch sensations with polymer tacticity and crystallinity

Hand Transplants, Daily Functioning, and the Human Capacity for Limb Regeneration

Bending as Key Mechanism in the Tactile Perception of Fibrillar Surfaces

Contact Info

Product

Resources

About