Preheat the air fryer to 350 degrees F (180 degrees C).

Cut a very thin slice lengthwise from the flattest side of 1 potato. Lay potato on a cutting board, cut-side down so it lies evenly without rolling. Place chopsticks lengthwise along the top and bottom edges of potato. Slice evenly across entire length of potato to make 1/4-inch slices, making sure the knife comes to rest on chopsticks each time, keeping the bottom of the potato intact. Repeat with remaining potatoes. Brush the outsides and between the slices with olive oil. Sprinkle with salt and pepper.

Place potatoes in the preheated air fryer basket and cook for 15 minutes. Brush with more olive oil and continue cooking until crispy on the edges and tender in the middle, about 15 minutes more. Sprinkle with chives to serve.